CITIZEN SR-135T User Manual
Page 8
SR8D1A-E.RTF SIZE : 140x75mm SCALE 2:1 2003/8/22
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E8 -
Key
input display
[2]
[
÷
] [3] [=]
0.666666666
[SHIFT]
[
]
SCI
FIX
[5]
0.66667
[
]
SCI
FIX
6.66667-01
[SHIFT]
[
]
SCI
FIX
[ • ]
6.6666666-01
(21) [X↔Y] : Exchange key.
Used to exchange the displayed number with the
contents of an internal register.
(22) [a], [b], [RÆP], [PÆR] : Coordinate conversion.
a. These keys convert the rectangular coordinate into the polar
coordinate and the polar coordinate into the rectangular
coordinate. The range units that have been set by the [DRG]
key follow.
b. Respective defined areas and accuracy are as shown in
behind chart however, the range of
θ
obtained by RÆP in
degree is as follows:
1st
Quadrant
0°
≤ θ ≤
90°
2nd
Quadrant
90°
≤ θ ≤ 180°
3rd
Quadrant
−180° ≤ θ ≤ −90°
4th
Quadrant
−90° ≤ θ ≤ 0°
c. Input of 2 variable is performed by setting x or r pressing [a]
key and y or
θ
pressing [b] key.
d. The operation result of x or r is obtained in the display register
or by pressing [a] key and y or
θ
by pressing [b] key.
Input Data
Result
a b a b
RÆP
(RectangularÆPolar)
x y r
θ
PÆR
(PolarÆRectangular)
r
θ
x y
(Ær,
θ) r =
2
2
y
x
+
,
θ = tan
−1
y/x
(Æx, y) x = r cos θ, y = r sinθ