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 deci- mal 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.

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

The calculator provides standard trigonometric functions and inverse trigonometric 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

The calculator uses [ 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.

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Citizen SR-270N manual Angle units conversion, Trigonometric / Inverse-Tri. functions, Hyperbolic / Inverse-Hyp. functions