Chapter 1: Operating the TI

Chapter 1: Operating the TI
Chapter 1:
Operating the TI-83 Plus Silver Edition
Documentation Conventions
In the body of this guidebook, TI-83 Plus (in silver) refers to the
TI-83 Plus Silver Edition. Sometimes, as in Chapter 19, the full
name TI-83 Plus Silver Edition is used to distinguish it from the
TI-83 Plus.
All the instructions and examples in this guidebook also work for
the TI-83 Plus. All the functions of the TI-83 Plus Silver Edition and the
TI-83 Plus are the same. The two calculators differ only in available RAM
memory and Flash application ROM memory.
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Operating the TI-83 Plus Silver Edition
1
TI-83 Plus Keyboard
Generally, the keyboard is divided into these zones: graphing keys,
editing keys, advanced function keys, and scientific calculator keys.
Keyboard Zones
Graphing — Graphing keys access the interactive graphing features.
Editing — Editing keys allow you to edit expressions and values.
Advanced — Advanced function keys display menus that access the
advanced functions.
Scientific — Scientific calculator keys access the capabilities of a
standard scientific calculator.
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Operating the TI-83 Plus Silver Edition
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TI-83 Plus
Graphing Keys
Editing Keys
Advanced
Function Keys
Scientific
Calculator Keys
Colors may vary in actual product.
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Operating the TI-83 Plus Silver Edition
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Using the Color.Coded Keyboard
The keys on the TI-83 Plus are color-coded to help you easily locate the
key you need.
The light gray keys are the number keys. The blue keys along the right side
of the keyboard are the common math functions. The blue keys across the
top set up and display graphs. The blue Πkey provides access to
applications such as the Finance application.
The primary function of each key is printed on the keys. For example,
when you press , the MATH menu is displayed.
Using the y and ƒ Keys
The secondary function of each key is printed in yellow above the key.
When you press the yellow y key, the character, abbreviation, or word
printed in yellow above the other keys becomes active for the next
keystroke. For example, when you press y and then , the TEST
menu is displayed. This guidebook describes this keystroke combination
as y :.
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Operating the TI-83 Plus Silver Edition
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The alpha function of each key is printed in green above the key. When
you press the green ƒ key, the alpha character printed in green
above the other keys becomes active for the next keystroke. For
example, when you press ƒ and then , the letter A is entered.
This guidebook describes this keystroke combination as ƒ [A].
The y key
accesses the
second function
printed in yellow
above each key.
The ƒ key
accesses the alpha
function printed in
green above each
key.
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Operating the TI-83 Plus Silver Edition
5
Turning On and Turning Off the TI-83 Plus
Turning On the Calculator
To turn on the TI-83 Plus, press É.
•
If you previously had turned off the
calculator by pressing y M, the
TI-83 Plus displays the home screen as it
was when you last used it and clears any
error.
•
If Automatic Power Down™ (APDé) had previously turned off the
calculator, the TI-83 Plus will return exactly as you left it, including the
display, cursor, and any error.
•
If the TI-83 Plus is turned off and you connect it to another calculator
or personal computer, the TI-83 Plus will “wake up” when you
complete the connection.
•
If the TI-83 Plus is turned off and connected to another calculator or
personal computer, any communication activity will “wake up” the
TI-83 Plus.
To prolong the life of the batteries, APD turns off the TI-83 Plus
automatically after about five minutes without any activity.
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Operating the TI-83 Plus Silver Edition
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Turning Off the Calculator
To turn off the TI-83 Plus manually, press y M.
•
All settings and memory contents are retained by Constant
Memory TM.
•
Any error condition is cleared.
Batteries
The TI-83 Plus uses four AAA alkaline batteries and has a userreplaceable backup lithium battery (CR1616 or CR1620). To replace
batteries without losing any information stored in memory, follow the
steps in Appendix B.
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Operating the TI-83 Plus Silver Edition
7
Setting the Display Contrast
Adjusting the Display Contrast
You can adjust the display contrast to suit your viewing angle and lighting
conditions. As you change the contrast setting, a number from 0 (lightest)
to 9 (darkest) in the top-right corner indicates the current level. You may
not be able to see the number if contrast is too light or too dark.
Note: The TI-83 Plus has 40 contrast settings, so each number 0 through 9
represents four settings.
The TI-83 Plus retains the contrast setting in memory when it is turned
off.
To adjust the contrast, follow these steps.
1. Press and release the y key.
2. Press and hold † or }, which are below and above the contrast
symbol (yellow, half-shaded circle).
•
† lightens the screen.
•
} darkens the screen.
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Note: If you adjust the contrast setting to 0, the display may become completely
blank. To restore the screen, press and release y, and then press and hold
} until the display reappears.
When to Replace Batteries
When the batteries are low, a low-battery message is displayed when
you:
•
Turn on the calculator.
•
Download a new application.
•
Attempt to upgrade to new software.
To replace the batteries without losing any information in memory, follow
the steps in Appendix B.
Generally, the calculator will continue to operate for one or two weeks
after the low-battery message is first displayed. After this period, the
TI-83 Plus will turn off automatically and the unit will not operate.
Batteries must be replaced. All memory should be retained.
Note: The operating period following the first low-battery message could be
longer than two weeks if you use the calculator infrequently.
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Operating the TI-83 Plus Silver Edition
9
The Display
Types of Displays
The TI-83 Plus displays both text and graphs. Chapter 3 describes
graphs. Chapter 9 describes how the TI-83 Plus can display a
horizontally or vertically split screen to show graphs and text
simultaneously.
Home Screen
The home screen is the primary screen of the TI-83 Plus. On this screen,
enter instructions to execute and expressions to evaluate. The answers
are displayed on the same screen.
Displaying Entries and Answers
When text is displayed, the TI-83 Plus screen can display a maximum of
8 lines with a maximum of 16 characters per line. If all lines of the display
are full, text scrolls off the top of the display. If an expression on the
home screen, the Y= editor (Chapter 3), or the program editor
(Chapter 16) is longer than one line, it wraps to the beginning of the next
line. In numeric editors such as the window screen (Chapter 3), a long
expression scrolls to the right and left.
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When an entry is executed on the home screen, the answer is displayed
on the right side of the next line.
Entry
Answer
The mode settings control the way the TI-83 Plus interprets expressions
and displays answers.
If an answer, such as a list or matrix, is too long to display entirely on
one line, an ellipsis (...) is displayed to the right or left. Press ~ and | to
display the answer.
Entry
Answer
Returning to the Home Screen
To return to the home screen from any other screen, press y 5.
Busy Indicator
When the TI-83 Plus is calculating or graphing, a vertical moving line is
displayed as a busy indicator in the top-right corner of the screen. When
you pause a graph or a program, the busy indicator becomes a vertical
moving dotted line.
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Operating the TI-83 Plus Silver Edition
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Display Cursors
In most cases, the appearance of the cursor indicates what will happen
when you press the next key or select the next menu item to be pasted
as a character.
Cursor
Appearance
Effect of Next Keystroke
Entry
Solid rectangle
$
A character is entered at the cursor; any
existing character is overwritten
Insert
Underline
__
A character is inserted in front of the cursor
location
Second
Reverse arrow
Þ
A 2nd character (yellow on the keyboard) is
entered or a 2nd operation is executed
Alpha
Reverse A
Ø
An alpha character (green on the keyboard)
is entered or SOLVE is executed
Full
Checkerboard
rectangle
#
No entry; the maximum characters are
entered at a prompt or memory is full
If you press ƒ during an insertion, the cursor becomes an underlined
A (A). If you press y during an insertion, the underlined cursor becomes
an underlined # (#).
Graphs and editors sometimes display additional cursors, which are
described in other chapters.
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Operating the TI-83 Plus Silver Edition
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Entering Expressions and Instructions
What Is an Expression?
An expression is a group of numbers, variables, functions and their
arguments, or a combination of these elements. An expression evaluates
to a single answer. On the TI-83 Plus, you enter an expression in the
same order as you would write it on paper. For example, pR2 is an
expression.
You can use an expression on the home screen to calculate an answer.
In most places where a value is required, you can use an expression to
enter a value.
Entering an Expression
To create an expression, you enter numbers, variables, and functions
from the keyboard and menus. An expression is completed when you
press Í, regardless of the cursor location. The entire expression is
evaluated according to Equation Operating System (EOSé) rules, and
the answer is displayed.
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Most TI-83 Plus functions and operations are symbols comprising
several characters. You must enter the symbol from the keyboard or a
menu; do not spell it out. For example, to calculate the log of 45, you
must press « 45. Do not enter the letters L, O, and G. If you enter LOG,
the TI-83 Plus interprets the entry as implied multiplication of the
variables L, O, and G.
Calculate 3.76 ÷ (L7.9 + ‡5) + 2 log 45.
3 Ë 76 ¥ £ Ì 7 Ë 9 Ã y C
5 ¤ ¤ Ã 2 « 45 ¤
Í
Multiple Entries on a Line
To enter two or more expressions or instructions on a line, separate
them with colons (ƒ [:]). All instructions are stored together in last
entry (ENTRY) .
Entering a Number in Scientific Notation
To enter a number in scientific notation, follow these steps.
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Operating the TI-83 Plus Silver Edition
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1. Enter the part of the number that precedes the exponent. This value
can be an expression.
2. Press y D. å is pasted to the cursor location.
3. If the exponent is negative, press Ì, and then enter the exponent,
which can be one or two digits.
When you enter a number in scientific notation, the TI-83 Plus does not
automatically display answers in scientific or engineering notation. The
mode settings and the size of the number determine the display format.
Functions
A function returns a value. For example, ÷, L, +, ‡(, and log( are the
functions in the example on the previous page. In general, the first letter of
each function is lowercase on the TI-83 Plus. Most functions take at least
one argument, as indicated by an open parenthesis ( ( ) following the
name. For example, sin( requires one argument, sin(value).
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Operating the TI-83 Plus Silver Edition
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Instructions
An instruction initiates an action. For example, ClrDraw is an instruction
that clears any drawn elements from a graph. Instructions cannot be
used in expressions. In general, the first letter of each instruction name
is uppercase. Some instructions take more than one argument, as
indicated by an open parenthesis ( ( ) at the end of the name. For
example, Circle( requires three arguments, Circle(X,Y,radius).
Interrupting a Calculation
To interrupt a calculation or graph in progress, which is indicated by the
busy indicator, press É.
When you interrupt a calculation, a menu is displayed.
•
To return to the home screen, select 1:Quit.
•
To go to the location of the interruption, select 2:Goto.
When you interrupt a graph, a partial graph is displayed.
•
To return to the home screen, press ‘ or any nongraphing key.
•
To restart graphing, press a graphing key or select a graphing
instruction.
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Operating the TI-83 Plus Silver Edition
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TI-83 Plus Edit Keys
Keystrokes
Result
~ or |
Moves the cursor within an expression; these keys repeat.
} or †
Moves the cursor from line to line within an expression that
occupies more than one line; these keys repeat.
On the top line of an expression on the home screen, } moves
the cursor to the beginning of the expression.
On the bottom line of an expression on the home screen, †
moves the cursor to the end of the expression.
y|
Moves the cursor to the beginning of an expression.
y~
Moves the cursor to the end of an expression.
Í
Evaluates an expression or executes an instruction.
‘
On a line with text on the home screen, clears the current line.
On a blank line on the home screen, clears everything on the
home screen.
In an editor, clears the expression or value where the cursor is
located; it does not store a zero.
{
Deletes a character at the cursor; this key repeats.
y6
Changes the cursor to an underline (__); inserts characters in
front of the underline cursor; to end insertion, press y 6 or
press |, }, ~, or †.
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Operating the TI-83 Plus Silver Edition
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Keystrokes
Result
y
Changes the cursor to Þ; the next keystroke performs a 2nd
operation (an operation in yellow above a key and to the left); to
cancel 2nd, press y again.
ƒ
Changes the cursor to Ø; the next keystroke pastes an alpha
character (a character in green above a key and to the right) or
executes SOLVE (Chapters 10 and 11); to cancel ƒ, press
ƒ or press |, }, ~, or †.
y7
Changes the cursor to Ø; sets alpha-lock; subsequent
keystrokes (on an alpha key) paste alpha characters; to cancel
alpha-lock, press ƒ. If you are prompted to enter a name
such as for a group or a program, alpha-lock is set automatically.
„
Pastes an X in Func mode, a T in Par mode, a q in Pol mode, or
an n in Seq mode with one keystroke.
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Operating the TI-83 Plus Silver Edition
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Setting Modes
Checking Mode Settings
Mode settings control how the TI-83 Plus displays and interprets
numbers and graphs. Mode settings are retained by the Constant
Memory feature when the TI-83 Plus is turned off. All numbers, including
elements of matrices and lists, are displayed according to the current
mode settings.
To display the mode settings, press z. The current settings are
highlighted. Defaults are highlighted below. The following pages describe
the mode settings in detail.
Normal Sci Eng
Numeric notation
Number of decimal places
Radian Degree
Unit of angle measure
Func Par Pol Seq
Type of graphing
Connected Dot
Whether to connect graph points
Sequential Simul Whether to plot simultaneously
Real a+bi re^qi
Real, rectangular complex, or polar complex
Full Horiz G-T
Full screen, two split-screen modes
Float 0123456789
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Operating the TI-83 Plus Silver Edition
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Changing Mode Settings
To change mode settings, follow these steps.
1. Press † or } to move the cursor to the line of the setting that you
want to change.
2. Press ~ or | to move the cursor to the setting you want.
3. Press Í.
Setting a Mode from a Program
You can set a mode from a program by entering the name of the mode
as an instruction; for example, Func or Float. From a blank program
command line, select the mode setting from the mode screen; the
instruction is pasted to the cursor location.
Normal, Sci, Eng
Notation modes only affect the way an answer is displayed on the home
screen. Numeric answers can be displayed with up to 10 digits and a
two-digit exponent. You can enter a number in any format.
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Operating the TI-83 Plus Silver Edition
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Normal notation mode is the usual way we express numbers, with digits
to the left and right of the decimal, as in 12345.67.
Sci (scientific) notation mode expresses numbers in two parts. The
significant digits display with one digit to the left of the decimal. The
appropriate power of 10 displays to the right of E, as in 1.234567E4.
Eng (engineering) notation mode is similar to scientific notation.
However, the number can have one, two, or three digits before the
decimal; and the power-of-10 exponent is a multiple of three, as in
12.34567E3.
Note: If you select Normal notation, but the answer cannot display in 10 digits
(or the absolute value is less than .001), the TI-83 Plus expresses the answer in
scientific notation.
Float, 0123456789
Float (floating) decimal mode displays up to 10 digits, plus the sign and
decimal.
0123456789 (fixed) decimal mode specifies the number of digits (0
through 9) to display to the right of the decimal. Place the cursor on the
desired number of decimal digits, and then press Í.
The decimal setting applies to Normal, Sci, and Eng notation modes.
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The decimal setting applies to these numbers:
•
An answer displayed on the home screen
•
Coordinates on a graph (Chapters 3, 4, 5, and 6)
•
The Tangent( DRAW instruction equation of the line, x, and dy/dx
values (Chapter 8)
•
Results of CALCULATE operations (Chapters 3, 4, 5, and 6)
•
The regression equation stored after the execution of a regression
model (Chapter 12)
Radian, Degree
Angle modes control how the TI-83 Plus interprets angle values in
trigonometric functions and polar/rectangular conversions.
Radian mode interprets angle values as radians. Answers display in
radians.
Degree mode interprets angle values as degrees. Answers display in
degrees.
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Operating the TI-83 Plus Silver Edition
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Func, Par, Pol, Seq
Graphing modes define the graphing parameters. Chapters 3, 4, 5, and 6
describe these modes in detail.
Func (function) graphing mode plots functions, where Y is a function of X
(Chapter 3).
Par (parametric) graphing mode plots relations, where X and Y are
functions of T (Chapter 4).
Pol (polar) graphing mode plots functions, where r is a function of q
(Chapter 5).
Seq (sequence) graphing mode plots sequences (Chapter 6).
Connected, Dot
Connected plotting mode draws a line connecting each point calculated
for the selected functions.
Dot plotting mode plots only the calculated points of the selected
functions.
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Sequential, Simul
Sequential graphing-order mode evaluates and plots one function
completely before the next function is evaluated and plotted.
Simul (simultaneous) graphing-order mode evaluates and plots all
selected functions for a single value of X and then evaluates and plots
them for the next value of X.
Note: Regardless of which graphing mode is selected, the TI-83 Plus will
sequentially graph all stat plots before it graphs any functions.
Real, a+bi, re^qi
Real mode does not display complex results unless complex numbers
are entered as input.
Two complex modes display complex results.
•
a+bi (rectangular complex mode) displays complex numbers in the
form a+bi.
•
re^qi (polar complex mode) displays complex numbers in the form
re^qi.
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Operating the TI-83 Plus Silver Edition
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Full, Horiz, G.T
Full screen mode uses the entire screen to display a graph or edit
screen.
Each split-screen mode displays two screens simultaneously.
•
Horiz (horizontal) mode displays the current graph on the top half of
the screen; it displays the home screen or an editor on the bottom
half (Chapter 9).
•
G.T (graph-table) mode displays the current graph on the left half of
the screen; it displays the table screen on the right half (Chapter 9).
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Operating the TI-83 Plus Silver Edition
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Using TI-83 Plus Variable Names
Variables and Defined Items
On the TI-83 Plus you can enter and use several types of data, including
real and complex numbers, matrices, lists, functions, stat plots, graph
databases, graph pictures, and strings.
The TI-83 Plus uses assigned names for variables and other items
saved in memory. For lists, you also can create your own five-character
names.
Variable Type
Names
Real numbers
A, B, ... , Z
Complex numbers
A, B, ... , Z
Matrices
ãAä, ãBä, ãCä, ... , ãJä
Lists
L1, L2, L3, L4, L5, L6, and user-defined names
Functions
Y1, Y2, . . . , Y9, Y0
Parametric equations
X1T and Y1T, . . . , X6T and Y6T
Polar functions
r1, r2, r3, r4, r5, r6
Sequence functions
u, v, w
Stat plots
Plot1, Plot2, Plot3
Graph databases
GDB1, GDB2, . . . , GDB9, GDB0
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Variable Type
Names
Graph pictures
Pic1, Pic2, ... , Pic9, Pic0
Strings
Str1, Str2, ... , Str9, Str0
Apps
Applications
AppVars
Application variables
Groups
Grouped variables
System variables
Xmin, Xmax, and others
Notes about Variables
•
You can create as many list names as memory will allow
(Chapter 11).
•
Programs have user-defined names and share memory with
variables (Chapter 16).
•
From the home screen or from a program, you can store to matrices
(Chapter 10), lists (Chapter 11), strings (Chapter 15), system
variables such as Xmax (Chapter 1), TblStart (Chapter 7), and all Y=
functions (Chapters 3, 4, 5, and 6).
•
From an editor, you can store to matrices, lists, and Y= functions
(Chapter 3).
•
From the home screen, a program, or an editor, you can store a
value to a matrix element or a list element.
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Operating the TI-83 Plus Silver Edition
27
•
You can use DRAW STO menu items to store and recall graph
databases and pictures (Chapter 8).
•
Although most variables can be archived, system variables including
r, t, x, y, and q cannot be archived (Chapter 18)
•
Apps are independent applications.which are stored in Flash ROM.
AppVars is a variable holder used to store variables created by
independent applications. You cannot edit or change variables in
AppVars unless you do so through the application which created
them.
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Operating the TI-83 Plus Silver Edition
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Storing Variable Values
Storing Values in a Variable
Values are stored to and recalled from memory using variable names.
When an expression containing the name of a variable is evaluated, the
value of the variable at that time is used.
To store a value to a variable from the home screen or a program using
the ¿ key, begin on a blank line and follow these steps.
1. Enter the value you want to store. The value can be an expression.
2. Press ¿. ! is copied to the cursor location.
3. Press ƒ and then the letter of the variable to which you want to
store the value.
4. Press Í. If you entered an expression, it is evaluated. The value
is stored to the variable.
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Operating the TI-83 Plus Silver Edition
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Displaying a Variable Value
To display the value of a variable, enter the name on a blank line on the
home screen, and then press Í.
Archiving Variables (Archive, Unarchive)
You can archive data, programs, or other variables in a section of
memory called user data archive where they cannot be edited or deleted
inadvertently. Archived variables are indicated by asterisks (*) to the left
of the variable names. Archived variables cannot be edited or executed.
They can only be seen and unarchived. For example, if you archive list
L1, you will see that L1 exists in memory but if you select it and paste the
name L1 to the home screen, you won’t be able to see its contents or
edit it until they are unarchived.
.
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Operating the TI-83 Plus Silver Edition
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Recalling Variable Values
Using Recall (RCL)
To recall and copy variable contents to the current cursor location, follow
these steps. To leave RCL, press ‘.
1. Press y ãRCLä. RCL and the edit cursor are displayed on the bottom
line of the screen.
2. Enter the name of the variable in any of five ways.
•
Press ƒ and then the letter of the variable.
•
Press y ãLISTä, and then select the name of the list, or press y
[Ln].
•
Press y >, and then select the name of the matrix.
•
Press  to display the VARS menu or  ~ to display the
VARS Y.VARS menu; then select the type and then the name of the
variable or function.
•
Press  |, and then select the name of the program (in the
program editor only).
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The variable name you selected is displayed on the bottom line and
the cursor disappears.
3. Press Í. The variable contents are inserted where the cursor
was located before you began these steps.
Note: You can edit the characters pasted to the expression without
affecting the value in memory.
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Operating the TI-83 Plus Silver Edition
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ENTRY (Last Entry) Storage Area
Using ENTRY (Last Entry)
When you press Í on the home screen to evaluate an expression or
execute an instruction, the expression or instruction is placed in a
storage area called ENTRY (last entry). When you turn off the TI-83 Plus,
ENTRY is retained in memory.
To recall ENTRY, press y [. The last entry is pasted to the current
cursor location, where you can edit and execute it. On the home screen
or in an editor, the current line is cleared and the last entry is pasted to
the line.
Because the TI-83 Plus updates ENTRY only when you press Í, you
can recall the previous entry even if you have begun to enter the next
expression.
5Ã7
Í
y[
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Operating the TI-83 Plus Silver Edition
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Accessing a Previous Entry
The TI-83 Plus retains as many previous entries as possible in ENTRY, up
to a capacity of 128 bytes. To scroll those entries, press y [
repeatedly. If a single entry is more than 128 bytes, it is retained for
ENTRY, but it cannot be placed in the ENTRY storage area.
1¿ƒA
Í
2¿ƒB
Í
y[
If you press y [ after displaying the oldest stored entry, the
newest stored entry is displayed again, then the next-newest entry, and
so on.
y[
Reexecuting the Previous Entry
After you have pasted the last entry to the home screen and edited it (if
you chose to edit it), you can execute the entry. To execute the last
entry, press Í.
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To reexecute the displayed entry, press Í again. Each reexecution
displays an answer on the right side of the next line; the entry itself is not
redisplayed.
0¿ƒN
Í
ƒNÃ1¿ƒNƒ
ã:ä ƒ N ¡ Í
Í
Í
Multiple Entry Values on a Line
To store to ENTRY two or more expressions or instructions, separate each
expression or instruction with a colon, then press Í. All expressions
and instructions separated by colons are stored in ENTRY.
When you press y [, all the expressions and instructions separated
by colons are pasted to the current cursor location. You can edit any of the
entries, and then execute all of them when you press Í.
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Operating the TI-83 Plus Silver Edition
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For the equation A=pr 2, use trial and error to find the radius of a circle that covers 200
square centimeters. Use 8 as your first guess.
8 ¿ ƒ R ƒ [:] y B
ƒR¡Íy[
y | 7 y 6 Ë 95
Í
Continue until the answer is as accurate as you want.
Clearing ENTRY
Clear Entries (Chapter 18) clears all data that the TI-83 Plus is holding in
the ENTRY storage area.
Using Ans in an Expression
When an expression is evaluated successfully from the home screen or
from a program, the TI-83 Plus stores the answer to a storage area
called Ans (last answer). Ans may be a real or complex number, a list, a
matrix, or a string. When you turn off the TI-83 Plus, the value in Ans is
retained in memory.
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Operating the TI-83 Plus Silver Edition
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You can use the variable Ans to represent the last answer in most places.
Press y Z to copy the variable name Ans to the cursor location. When
the expression is evaluated, the TI-83 Plus uses the value of Ans in the
calculation.
Calculate the area of a garden plot 1.7 meters by 4.2 meters. Then calculate the yield
per square meter if the plot produces a total of 147 tomatoes.
1Ë7¯4Ë2
Í
147 ¥ y Z
Í
Continuing an Expression
You can use Ans as the first entry in the next expression without entering
the value again or pressing y Z. On a blank line on the home
screen, enter the function. The TI-83 Plus pastes the variable name Ans
to the screen, then the function.
5¥2
Í
¯9Ë9
Í
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Operating the TI-83 Plus Silver Edition
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Storing Answers
To store an answer, store Ans to a variable before you evaluate another
expression.
Calculate the area of a circle of radius 5 meters. Next, calculate the volume of a cylinder
of radius 5 meters and height 3.3 meters, and then store the result in the variable V.
yB5 ¡
Í
¯3Ë3
Í
¿ƒV
Í
TI-83 Plus
Operating the TI-83 Plus Silver Edition
38
TI-83 Plus Menus
Using a TI-83 Plus Menu
You can access most TI-83 Plus operations using menus. When you
press a key or key combination to display a menu, one or more menu
names appear on the top line of the screen.
•
The menu name on the left side of the top line is highlighted. Up to
seven items in that menu are displayed, beginning with item 1, which
also is highlighted.
•
A number or letter identifies each menu item’s place in the menu. The
order is 1 through 9, then 0, then A, B, C, and so on. The LIST NAMES,
PRGM EXEC, and PRGM EDIT menus only label items 1 through 9 and 0.
•
When the menu continues beyond the displayed items, a down arrow
($) replaces the colon next to the last displayed item.
•
When a menu item ends in an ellipsis (...), the item displays a
secondary menu or editor when you select it.
•
When an asterisk (*) appears to the left of a menu item, that item is
stored in user data archive (Chapter 18).
TI-83 Plus
Operating the TI-83 Plus Silver Edition
39
To display any other menu listed on the top line, press ~ or | until that
menu name is highlighted. The cursor location within the initial menu is
irrelevant. The menu is displayed with the cursor on the first item.
Note: The Menu Map in Appendix A shows each menu, each operation under
each menu, and the key or key combination you press to display each menu.
Displaying a Menu
While using your TI-83 Plus, you often will need
to access items from its menus.
When you press a key that displays a menu, that
menu temporarily replaces the screen where you
are working. For example, when you press ,
the MATH menu is displayed as a full screen.
After you select an item from a menu, the screen
where you are working usually is displayed again.
TI-83 Plus
Operating the TI-83 Plus Silver Edition
40
Moving from One Menu to Another
Some keys access more than one menu. When
you press such a key, the names of all accessible
menus are displayed on the top line. When you
highlight a menu name, the items in that menu are
displayed. Press ~ and | to highlight each menu
name.
Scrolling a Menu
To scroll down the menu items, press †. To scroll up the menu items,
press }.
To page down six menu items at a time, press ƒ †. To page up six
menu items at a time, press ƒ }. The green arrows on the
calculator, between † and }, are the page-down and page-up symbols.
To wrap to the last menu item directly from the first menu item, press }.
To wrap to the first menu item directly from the last menu item, press †.
Selecting an Item from a Menu
You can select an item from a menu in either of two ways.
TI-83 Plus
Operating the TI-83 Plus Silver Edition
41
•
Press the number or letter of the item you want
to select. The cursor can be anywhere on the
menu, and the item you select need not be
displayed on the screen.
•
Press † or } to move the cursor to the item
you want, and then press Í.
After you select an item from a menu, the
TI-83 Plus typically displays the previous screen.
Note: On the LIST NAMES, PRGM EXEC, and PRGM EDIT menus, only items 1
through 9 and 0 are labeled in such a way that you can select them by pressing
the appropriate number key. To move the cursor to the first item beginning with
any alpha character or q, press the key combination for that alpha character or
q. If no items begin with that character, the cursor moves beyond it to the next
item.
Calculate 3‡27.
†††Í
27 ¤ Í
TI-83 Plus
Operating the TI-83 Plus Silver Edition
42
Leaving a Menu without Making a Selection
You can leave a menu without making a selection in any of four ways.
•
Press y 5 to return to the home screen.
•
Press ‘ to return to the previous screen.
•
Press a key or key combination for a different menu, such as  or
y 9.
•
Press a key or key combination for a different screen, such as o or
y 0.
TI-83 Plus
Operating the TI-83 Plus Silver Edition
43
VARS and VARS Y.VARS Menus
VARS Menu
You can enter the names of functions and system variables in an
expression or store to them directly.
To display the VARS menu, press . All VARS menu items display
secondary menus, which show the names of the system variables.
1:Window, 2:Zoom, and 5:Statistics each access more than one
secondary menu.
VARS Y-VARS
1: Window...
X/Y, T/q,
2: Zoom...
3: GDB...
4: Picture...
5: Statistics...
6: Table...
7: String...
TI-83 Plus
and U/V/W variables
and ZU variables
Graph database variables
Picture variables
XY, G, EQ, TEST, and PTS variables
TABLE variables
String variables
ZX/ZY, ZT/Zq,
Operating the TI-83 Plus Silver Edition
44
Selecting a Variable from the VARS Menu or VARS Y.VARS Menu
To display the VARS Y.VARS menu, press  ~. 1:Function,
2:Parametric, and 3:Polar display secondary menus of the Y= function
variables.
VARS
Y-VARS
1: Function...
2: Parametric...
3: Polar...
4: On/Off...
Yn functions
XnT, YnT functions
rn functions
Lets you select/deselect functions
Note: The sequence variables (u, v, w) are located on the keyboard as the
second functions of ¬, −, and ®.
To select a variable from the VARS or VARS Y.VARS menu, follow these
steps.
1. Display the VARS or VARS Y.VARS menu.
•
Press  to display the VARS menu.
•
Press  ~ to display the VARS Y.VARS menu.
2. Select the type of variable, such as 2:Zoom from the VARS menu or
3:Polar from the VARS Y.VARS menu. A secondary menu is displayed.
TI-83 Plus
Operating the TI-83 Plus Silver Edition
45
3. If you selected 1:Window, 2:Zoom, or 5:Statistics from the VARS menu,
you can press ~ or | to display other secondary menus.
4. Select a variable name from the menu. It is pasted to the cursor
location.
TI-83 Plus
Operating the TI-83 Plus Silver Edition
46
Equation Operating System (EOS)
Order of Evaluation
The Equation Operating System (EOS) defines the order in which
functions in expressions are entered and evaluated on the TI-83 Plus.
EOS lets you enter numbers and functions in a simple, straightforward
sequence.
EOS evaluates the functions in an expression in this order.
Order Number Function
1
2
3
4
5
6
7
8
9
TI-83 Plus
Functions that precede the argument, such as ‡(, sin(, or log(
Functions that are entered after the argument, such as 2, M1, !, ¡,
r, and conversions
Powers and roots, such as 2^5 or 5x‡32
Permutations (nPr) and combinations (nCr)
Multiplication, implied multiplication, and division
Addition and subtraction
Relational functions, such as > or 
Logic operator and
Logic operators or and xor
Operating the TI-83 Plus Silver Edition
47
Note: Within a priority level, EOS evaluates functions from left to right.
Calculations within parentheses are evaluated first.
Implied Multiplication
The TI-83 Plus recognizes implied multiplication, so you need not press
¯ to express multiplication in all cases. For example, the TI-83 Plus
interprets 2p, 4sin(46), 5(1+2), and (2ä5)7 as implied multiplication.
Note: TI-83 Plus implied multiplication rules, although like theTI.83, differ from
those of the TI.82. For example, the TI-83 Plus evaluates 1à2X as (1à2)äX,
while the TI.82 evaluates 1à2X as 1/(2äX) (Chapter 2).
Parentheses
All calculations inside a pair of parentheses are completed first. For
example, in the expression 4(1+2), EOS first evaluates the portion inside
the parentheses, 1+2, and then multiplies the answer, 3, by 4.
You can omit the close parenthesis ( ) ) at the end of an expression. All
open parenthetical elements are closed automatically at the end of an
expression. This is also true for open parenthetical elements that
precede the store or display-conversion instructions.
TI-83 Plus
Operating the TI-83 Plus Silver Edition
48
Note: An open parenthesis following a list name, matrix name, or Y= function
name does not indicate implied multiplication. It specifies elements in the list
(Chapter 11) or matrix (Chapter 10) and specifies a value for which to solve the
Y= function.
Negation
To enter a negative number, use the negation key. Press Ì and then
enter the number. On the TI-83 Plus, negation is in the third level in the
EOS hierarchy. Functions in the first level, such as squaring, are
evaluated before negation.
For example, MX2, evaluates to a negative number (or 0). Use
parentheses to square a negative number.
Note: Use the ¹ key for subtraction and the Ì key for negation. If you press ¹
to enter a negative number, as in 9 ¯ ¹ 7, or if you press Ì to indicate
subtraction, as in 9 Ì 7, an error occurs. If you press ƒ A Ì ƒ B, it is
interpreted as implied multiplication (AäMB).
TI-83 Plus
Operating the TI-83 Plus Silver Edition
49
Special Features of the TI-83 Plus
Flash – Electronic Upgradability
The TI-83 Plus uses Flash
technology, which lets you
upgrade to future software
versions without buying a new
calculator.
For details, refer to:
Chapter 19
As new functionality becomes available, you can electronically upgrade
your TI-83 Plus from the Internet. Future software versions include
maintenance upgrades that will be released free of charge, as well as
new applications and major software upgrades that will be available for
purchase from the TI web site: education.ti.com
1.56 Megabytes (M) of Available Memory
1.56 M of available memory are built into the
TI-83 Plus. About 24 kilobytes (K) of RAM
(random access memory) are available for you
to compute and store functions, programs, and
data.
For details, refer to:
Chapter 18
About 1.54 M of user data archive allow you to store data, programs,
applications, or any other variables to a safe location where they cannot
TI-83 Plus
Operating the TI-83 Plus Silver Edition
50
be edited or deleted inadvertently. You can also free up RAM by
archiving variables to user data
Applications
Applications can be installed to customize the
TI-83 Plus to your classroom needs. The big
1.54 M archive space lets you store up to 94
applications at one time. Applications can also
be stored on a computer for later use or linked
unit-to-unit.
For details, refer to:
Chapter 18
Archiving
You can store variables in the TI-83 Plus user
For details, refer to:
Chapter 18
data archive, a protected area of memory
separate from RAM. The user data archive lets
you:
• Store data, programs, applications or any other variables to a safe
location where they cannot be edited or deleted inadvertently.
•
Create additional free RAM by archiving variables.
By archiving variables that do not need to be edited frequently, you can
free up RAM for applications that may require additional memory.
TI-83 Plus
Operating the TI-83 Plus Silver Edition
51
Calculator-Based Laboratoryé (CBL 2é, CBLé) and
Calculator-Based Rangeré (CBRé)
The TI-83 Plus comes with the CBL/CBR
application already installed. When coupled
with the (optional) CBL 2/CBL or CBR
accessories, you can use the TI-83 Plus to
analyze real world data.
For details, refer to:
Chapter 14
CBL 2/CBL and CBR let you explore mathematical and scientific
relationships among distance, velocity, acceleration, and time using data
collected from activities you perform.
CBL 2/CBL and CBR differ in that CBL 2/CBL allows you to collect data
using several different probes analyzing temperature, light, voltage, or
sonic (motion) data. CBR collects data using a built-in Sonic probe.
CBL 2/CBL and CBR accessories can be linked together to collect more
than one type of data at the same time. You can find more information
on CBL 2/CBL and CBR in their user manuals.
TI-83 Plus
Operating the TI-83 Plus Silver Edition
52
Other TI-83 Plus Features
Getting Started has introduced you to basic TI-83 Plus operations. This
guidebook covers the other features and capabilities of the TI-83 Plus in
greater detail.
Graphing
You can store, graph, and analyze up to 10
functions, up to six parametric functions, up to
six polar functions, and up to three sequences.
You can use DRAW instructions to annotate
graphs.
For graphing details,
refer to:
Chapters 3, 4, 5, 6, 8
The graphing chapters appear in this order: Function, Parametric, Polar,
Sequence, and DRAW.
Sequences
You can generate sequences and graph them
over time. Or, you can graph them as web plots
or as phase plots.
TI-83 Plus
Operating the TI-83 Plus Silver Edition
For details, refer to:
Chapter 6
53
Tables
You can create function evaluation tables to
analyze many functions simultaneously.
For details, refer to:
Chapter 7
Split Screen
You can split the screen horizontally to display
both a graph and a related editor (such as the
Y= editor), the table, the stat list editor, or the
home screen. Also, you can split the screen
vertically to display a graph and its table
simultaneously.
For details, refer to:
Chapter 9
Matrices
You can enter and save up to 10 matrices and
perform standard matrix operations on them.
TI-83 Plus
Operating the TI-83 Plus Silver Edition
For details, refer to:
Chapter 10
54
Lists
You can enter and save as many lists as
memory allows for use in statistical analyses.
You can attach formulas to lists for automatic
computation. You can use lists to evaluate
expressions at multiple values simultaneously
and to graph a family of curves.
For details, refer to:
Chapter 11
Statistics
You can perform one- and two-variable, listbased statistical analyses, including logistic and
sine regression analysis. You can plot the data
as a histogram, xyLine, scatter plot, modified or
regular box-and-whisker plot, or normal
probability plot. You can define and store up to
three stat plot definitions.
For details, refer to:
Chapter 12
Inferential Statistics
You can perform 16 hypothesis tests and
confidence intervals and 15 distribution
functions. You can display hypothesis test
results graphically or numerically.
TI-83 Plus
Operating the TI-83 Plus Silver Edition
For details, refer to:
Chapter 13
55
Applications
You can use such applications as Finance or
For details, refer to:
the CBL/CBR. With the Finance application you Chapter 14
can use time-value-of-money (TVM) functions to
analyze financial instruments such as annuities,
loans, mortgages, leases, and savings. You can analyze the value of
money over equal time periods using cash flow functions. You can
amortize loans with the amortization functions. With the CBL/CBR
applications and CBL 2/CBL or CBR (optional) accessories, you can use
a variety of probes to collect real world data.
Your TI-83 Plus includes Flash applications in addition to the ones
mentioned above. Press Πto see the complete list of applications
that came with your calculator.
Documentation for TI Flash applications is on the TI Resource CD. Visit
education.ti.com/calc/guides for additional Flash application guidebooks.
CATALOG
The CATALOG is a convenient, alphabetical list of For details, refer to:
all functions and instructions on the TI-83 Plus. Chapter 15
You can paste any function or instruction from
the CATALOG to the current cursor location.
TI-83 Plus
Operating the TI-83 Plus Silver Edition
56
Programming
You can enter and store programs that include
extensive control and input/output instructions.
For details, refer to:
Chapter 16
Archiving
Archiving allows you to store data, programs, or
other variables to user data archive where they
cannot be edited or deleted inadvertently.
Archiving also allows you to free up RAM for
variables that may require additional memory.
For details, refer to:
Chapter 16
Archived variables are
indicated by asterisks (*) to
the left of the variable
names.
Communication Link
The TI-83 Plus has a port to connect and
communicate with another TI-83 Plus, a
TI-83 Plus, a TI.83, a TI-82, a TI-73,
CBL 2/CBL, or a CBR System.
TI-83 Plus
Operating the TI-83 Plus Silver Edition
For details, refer to:
Chapter 19
57
With the TI™ Connect or TI-GRAPH LINK™ software and a TI-GRAPH LINK
cable, you can also link the TI-83 Plus to a personal computer.
As future software upgrades become available on the TI web site, you
can download the software to your PC and then use the TI Connect or
TI-GRAPH LINK software and a TI-GRAPH LINK cable to upgrade your
TI-83 Plus.
TI-83 Plus
Operating the TI-83 Plus Silver Edition
58
Error Conditions
Diagnosing an Error
The TI-83 Plus detects errors while performing these tasks.
•
Evaluating an expression
•
Executing an instruction
•
Plotting a graph
•
Storing a value
When the TI-83 Plus detects an error, it returns an error message as a
menu title, such as ERR:SYNTAX or ERR:DOMAIN. Appendix B describes
each error type and possible reasons for the error.
•
If you select 1:Quit (or press y 5 or ‘), then the home
screen is displayed.
•
If you select 2:Goto, then the previous screen is displayed with the
cursor at or near the error location.
Note: If a syntax error occurs in the contents of a Y= function during program
execution, then the Goto option returns to the Y= editor, not to the program.
TI-83 Plus
Operating the TI-83 Plus Silver Edition
59
Correcting an Error
To correct an error, follow these steps.
1. Note the error type (ERR:error type).
2. Select 2:Goto, if it is available. The previous screen is displayed with
the cursor at or near the error location.
3. Determine the error. If you cannot recognize the error, refer to
Appendix B.
4. Correct the expression.
TI-83 Plus
Operating the TI-83 Plus Silver Edition
60
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