$\"\"$

The trigonometric expression is $\"\"$ .

$\"\"$ is cooresponds to the point $\"\"$ on the unit circle.

Trigonometric function : $\"\"$ .

$\"\"$ .

$\"\"$

Take the angle $\"\"$ .

$\"\"$ is cooresponds to the point $\"\"$ on the unit circle.

Trigonometric function : $\"\"$ .

$\"\"$ .

Take the angle $\"\"$ .

$\"\"$ is cooresponds to the point $\"\"$ on the unit circle.

Trigonometric function : $\"\"$ .

$\"\"$ .

$\"\"$

$\"\"$ or $\"\"$ .

$\"\"$

$\"\"$ or $\"\"$ .