Casio fx-7400G, Руководство пользователя

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33
Basic Calculations Chapter 2
Example To calculate x and y when r = 25 and
%
= 56 °
Operation Display
!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 u u u u Permutation u u u u u Combination
Example To calculate the possible number of different arrangements
using 4 items selected from among 10 items
Formula Operation Display
10
P
4
= 5040 10 K 4 (PROB)
2 (
n
P
r
) 4 w 5040
Example To calculate the possible number of different combinations of
4 items that can be selected from among 10 items
Formula Operation Display
10
C
4
= 210 10
K 4
(PROB)
3
(
n
C
r
) 4
w
210
(6) Other Things to Remember
k k
k k
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
, Pol(
x
,
y
), Rec(
r
,
%
),
d
/
dx
,
Seq, Min, Max, Mean, Median, List, Dim, Sum
Examples: 2 sin30, 10log1.2, 2 3, etc.
• In front of constants, variable names, Ans memory contents.
Examples: 2
"
, 2AB, 3Ans, 6X, etc.
• In front of an open parenthesis.
Examples: 3(5 + 6), (A + 1)(B –1)
n
!
n
!
n
P
r
= –––––
n
C
r
= –––––––
(
n
–
r
)!
r
! (
n
–
r
)!