Hyperbolic / Inverse-Hyp. Functions; Coordinates Transformation - Citizen SR-281N Instruction Manual

–1
3 sin 0.5 = 90 deg
–1
3 [ 2nd ] [ sin ] 0.5 [=]

Hyperbolic / Inverse-Hyp. functions

SR-281N uses [ 2nd ] [ HYP ] to calculate the hyperbolic functions and
inverse-hyperbolic functions - sinh, cosh, tanh, sinh
–1
tanh .
(Note) : When using those keys, make sure the calculator is set for the
angle unit you want.
cosh 1.5 + 2 = 4.35240961524
[ 2nd ] [ HYP ] [ cos ] 1.5 [ + ] 2 [=]
–1
sinh 7 = 2.64412076106
–1
[ 2nd ] [ HYP ] [ 2nd ] [ sin ] 7 [=]

Coordinates transformation

Rectangular Coordinates Polar Coordinates
θ
x + y i = r (cos + i sin
(Note) : When using those key, make sure the calculator is set for the
angle unit you want.
The calculator can perform the conversion between rectangular
coordinates and polar coordinates by [ 2nd ] [ P R ] and [ 2nd ]
[ R P ].
θ
If x = 5, y = 30, what are r, ? Ans : r = 30.4138126515,
o
θ
= 80.537677792
[ R P ] 5 [ 2
[ 2nd ] nd ] [ ] 30
-E16-
File name : CBM_SR-281N_IB_English_black_v09330.doc
Date: 2009/3/30 Trimmed Size : 140 x 75 mm
DEG
–1
3 s i n 0 . 5 =
9 0 .
–1 –1
, cosh and
DEG
c o s h 1 . 5 + 2 =
4 . 3 5 2 4 0 9 6 1 5 2 4
DEG
–1
s i n h 1 7 =
2 . 6 4 4 1 2 0 7 6 1 0 6
θ
)
DEG ( )
R P ( 5 ,
3 0
SCALE 1 : 1