CITIZEN SR-270II - Manual (Page 5)

5
• The calculator enables you to repeat the last operation executed by
pressing [ = ] key for further calculation. See Example 14.
• Even if calculations are concluded with the [ = ] key, the result obtained
can be used for further calculation. See Example 15.
Answer function
• Answer function stores the most recently calculated result. It is re-
tained even after the power is turned off. Once a numeric value or
numeric expression is entered and [ = ] is pressed, the result is stored
by this function. See Example 16.
(Note) : Even if execution of a calculation results in an error, however,
Answer memory retains its current value.
Scientific Calculation
☺ Use the COMP mode for scientific calculations.
Logarithms and Antilogarithms
• The calculator can calculate common and natural logarithms and anti-
logarithms using [ log ], [ ln ], [ 2nd ] [ 10 x ], and [ 2nd ] [ e x ]. See
Example 17~19.
Fraction calculation
Fraction value display is as follow :
(Note) :Values are automatically displayed in decimal format whenever
the total number of digits of a fractional values (integer + nu-
merator + denominator + separator marks) exceeds 10.
• To enter a mixed number, enter the integer part, press [ a b /
c
], enter the
numerator, press [ a b /
c
], and enter the denominator ; To enter an
improper fraction, enter the numerator, press [ a b /
c
], and enter the
denominator. See Example 20.
• By pressing [ 2nd ] [ d /
c
], the displayed value will be converted to the
improper fraction and vice versa. To convert between a decimal and
fractional result, press [ a
b /
c
] .See Example 21.
• Calculations containing both fractions and decimals are calculated in
decimal format. See Example 22.
Angle units conversion
The angle units (DEG, RAD, GRAD) is set by pressing [ MODE ] to
display the angle menu. The relation among the three angle units is :
180 ° = π rad = 200 grad
Angle conversions ( See Example 23.) :
1. Change the default angle settings to the units you
want to convert to.
2. Enter the value of the unit to convert.
3. Press [ DRG
→
] to display the menu.
3 2 1
G R D
The units you can select are D (degrees), R (radians), G
(Gradians).
4.
Choose the units you are converting from.
5. Press [ = ].
Trigonometric / Inverse-Tri. functions
• SR-270 II provides standard trigonometric functions and inverse trigo-
nometric 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-270 II uses [ 2nd ] [ HYP ] to calculate the hyperbolic functions and
inverse- hyperbolic functions - sinh, cosh, tanh, sinh –1 , cosh –1 and
tanh –1 . See Example 27~28.
(Note) :When using those keys, make sure the calculator is set for the
angle unit you want.
Sexagesimal
↔ ↔ ↔ ↔ ↔
Decimal transformation
Sexagesimal notation is as follow
12 59 45.6 Represent 12 Degree, 59 Minutes, 45.6 Seconds
• The calculator can preform the conversion between decimal and
sexagesimal numbers by [ ] and [ 2nd ] [ ]. See Example
29~30.
Coordinates transformation
Rectangular Coordinates Polar Coordinates
56 ┘ 5
┘
12 Display of 56
5
┘
12 Display of
12
5
12
5