Observe the diagram.
\Tthe length of opposite side to
is
.
The length of adjacent side to
is
.
The length of the hypotenuse is
.
Find sides of a rightangle triangle
and
using trigonometric functions.
Trigonometric function :
.

Trigonometric function :
.

Find the angle
.
In the diagram sum of angles
and
is equal to
.


,
and
.
,
and
.