Sharp Scientific calculator

24
[DEG mode]
<Example>
Operation Display
θ = sin
-1
b
a
θ = cos
-1
c
a
θ = tan
-1
b
c
c
a
b
θ
100
80
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;
(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 b/c for two sides of a right triangle.
At what angle should an airplane climb in order
to climb 80 meters in 100 meters?
GuideBookEL-W53107.2.52:48PMページ24