Casio 3950P, Programming Manual

Page: 34 / 48

32
22 Rotation
The following matrix rotates a point , in the plane,
through an angle of in the anti-clockwise direction.
Program
？→ Ｘ：？→ Ｙ：？→ Ａ：Ｘ → Ｃ：Ｙ → Ｄ：
C
ｃｏｓ Ａ － Ｄｓｉｎ Ａ → Ｘ：Ｃｓｉｎ
Ａ ＋ Ｄｃｏｓ Ａ → Ｙ：Ｘ Ｙ ＜
43 STEP
＞
INPUT X, Y : point befor rotation A : rotation angle
OUTPUT
Ｘ
,
Ｙ
: point after rotation
Execution Example:
Find the location of the point (1,0) after rotation through an angle of .
To obtain the answer in radians, press before
executing the program.
x y ,
( )
θ
θ
(
x’, y’
)
(
x, y
)
x
′
y
′
 
 
 
θ
cos
θ
sin
θ
sin –
θ
cos
 
 
 
 
x
y
 
 
 
=
ON
MODE MODE MODE 1
PRGM
MODE 1
COMP
1
P1
x y ,
( )
θ
x y ,
( )
π
3
---
MODE MODE
MODE MODE 2
Rad
S A D R P2 P3 P4 G
Prog 1
1
EXE
0
EXE
S A D R P1 P1 P2 P3 P4 G
SHIHT EXP
π
3 EXE
Disp
S A D R P1 P1 P2 P3 P4 G
EXE S A D R P1 P1 P2 P3 P4 G
8 8 8 8 8 8
MODE MODE MODE MODE
2
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