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Citizen sr270x Manual

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File name : HDB0R100704_English_text_071113
version : 07/10/15
Sexagesimal
↔
Decimal transformation
You can use sexagesimal figure (degree, minute and second) to
perform calculations and convert values between sexagesimal and
decimal notation by using [ DMS ] or [ 2nd ] [
e
DMS ] keys. See
Example 22~23.
Sexagesimal figure value display is as follows:
125
45
׀
30
׀ ׀
Represent 125 degrees (D),
45 minutes(M), 30 seconds(S)
Trigonometric / Inverse-Tri. functions
SR-270X provides standard trigonometric functions and inverse
trigonometric functions: sin, cos, tan, sin
–1
, cos
–1
and tan
–1
. See
Example 24~26.
(Note) : When using those keys, make sure the calculator is set
for the angle unit you want.
Hyperbolic / Inverse-Hyp. functions
SR-270X uses [ HYP ] to calculate the hyperbolic functions and
inverse-hyperbolic functions: sinh, cosh, tanh, sinh
–1
, cosh
–1
and
tanh
–1
. Press [ HYP ] to display the menu and then select the
corresponding number to perform the function item. See Example
27~28.
(Note) : When using those keys, make sure the calculator is set
for the angle unit you want.
Coordinates transformation
Rectangular Coordinates Polar Coordinates
x + y i = r (cos
θ
+ i sin
θ
)
(Note) : When using those keys, 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 ]. See Example 29~30.
Probability
This calculator provides the following probability functions (See
Example 31~34.):
[ nPr ] Calculates the number of possible permutations of n item
taken r at a time.
… 13 …


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