Sharp V/R manual Arc Trigonometric Functions

Arc Trigonometric Functions

Arc trigonometric functions, the inverse of trigonomet-
ric functions, are used to determine an angle from ratios
of a right triangle.The combinations of the three sides
are sin-1, cos-1, and tan-1.Their relations are;	θ

(arc sine) Determines an angle based on the ratio b/a of two sides of a right triangle.

(arc cosine) Determines an angle based on the ratio c/a for two sides of a right triangle.

(arc tangent) Determines an angle based on the ratio a/b for two sides of a right triangle.

a

b

c

θ= sin-1ba

θ= cos-1ca

θ= tan-1bc

<Example>

At what angle should an airplane climb in order to climb 80 meters in 100 meters?

[DEG mode]

O per ation

80

100

D isplay

DEG

22