K permutation, K combination – Casio fx-85WA User Manual
Page 20
E-18
2.
00
T
1.
00
1.732050808
00
R
1.047197551
00
840.
210.
k Coordinate Conversion (Pol(x, y), Rec (r, θ))
• Calculation results are automatically assigned to vari-
ables E and F.
• Example 1: To convert polar coordinates (r
҃2,
҃60°)
to rectangular coordinates (x, y) (DEG mode)
x
A
F
2
P
60
T
=
y
0
o
•
0
n
,
0
o
swaps displayed value with value in
memory.
• Example 2: To convert rectangular coordinates (1, 3)
to polar coordinates (r,
) (RAD mode)
r
f
1
P
L
3
T
=
θ
0
o
•
0
n
,
0
o
swaps displayed value with value in
memory.
k Permutation
• Example: To determine how many different 4-digit val-
ues can be produced using the numbers 1 through 7
• Numbers cannot be duplicated within the same 4-digit
value (1234 is allowed, but 1123 is not).
7
A
m
4
=
k Combination
• Example: To determine how many different 4-member
groups can be organized in a group of 10 individuals
10
n
4
=
(fx-85W:
A
n
)