$\"\"$

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

Observe the graph :

$\"graph$

$\"\"$

The angle $\"\"$ lies in quadrant four because that is the only quadrant in which the cosine is positive and tangent is negative.

The trigonometric function $\"\"$ .

$\"\"$

The values of the trigonometric functions are :

$\"\"$

The values of the six trigonometric functions are

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