advertisement
Basic Calculations Chapter 2
Example To calculate x and y when r = 25 and
θ
= 56
°
Display Operation
!Z
cc 1 (Deg) Q
K[ 2 (ANGL) [[
2 (Rec() 25 , 56 ) w Ans
1 –13.979 –
→
13.97982259 ( x )
2 –20.725 – →
20.72593931 ( y )
(5) Permutation and Combination
u Permutation n P r n !
( n – r )!
u Combination n C r n !
r ! ( n – r )!
Example
10
P
4
= 5040
To calculate the possible number of different arrangements using 4 items selected from 10 items
Formula Operation
10 K 4 (PROB)
2 ( n P r ) 4 w
Display
5040
Example
10
C
4
= 210
To calculate the possible number of different combinations of
4 items selected from 10 items
Formula Operation
10 K 4 (PROB)
3 ( n C r ) 4 w
Display
210
(6) Other Things to Remember
k
Multiplication Sign
You can leave out the multiplication sign in any of the following cases.
• In front of the following scientific functions: sin, cos, tan, sin –1 , cos –1 , tan –1 , log, In, 10 x
, e x
, , 3
Seq, Min, Max, Mean, Median, List, Dim, Sum
, Pol( x , y ), Rec( r ,
θ
), d / dx ,
Examples: 2 sin30, 10log1.2, 2 3, etc.
• In front of constants, variable names, Ans memory contents.
Examples: 2
π
, 2AB, 3Ans, 6X, etc.
• In front of an open parenthesis.
Examples: 3(5 + 6), (A + 1)(B –1)
33
advertisement