Write the side length $\"\"$ using trigonometric function of the angle $\"\"$ . \ \ \ \ The right angle is on the left hand corner is angle $\"\"$ .

$\"\"$ is the left side of the triangle height. \ \ \ \ $\"\"$ is the length of the bottom of the triangle that goes to angle $\"\"$ .

It is on the right side, opposite the $\"\"$ .

Draw the right angle to find the side length $\"\"$ .

$\"\"$

Observe the rightangle figure:

Trigonometric function,

$\"\"$

Substitute $\"\"$ in the trigonometric function.

$\"\"$

The side length of the right angle is $\"\"$