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 :

5

12

Display of

5

 

 

12

 

 

 

 

 

 

5

56 5

12

Display of 56

12

(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.

D R G

1 2 3

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-270IIprovides standard trigonometric functions and inverse trigo- nometric functions - sin, cos, tan, sin –1, cos –1and 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-270IIuses [ 2nd ] [ HYP ] to calculate the hyperbolic functions and inverse- hyperbolic functions - sinh, cosh, tanh, sinh –1, cosh –1and 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

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Citizen SR-270II manual Scientific Calculation