$\"\"$

Find $\"\"$ and $\"\"$ .

The trigonometric function is $\"\"$ .

Apply Pythagorean identtiy : $\"\"$ .

$\"\"$

Since $\"\"$ , the angle $\"\"$ is in third quadrant.

$\"\"$ .

$\"\"$

Apply reciprocal identity : $\"\"$ .

$\"\"$

Apply Pythagorean identity : $\"\"$ .

$\"\"$

The values of $\"\"$ and $\"\"$ .