$\"\"$

The angle is $\"\"$ .

If $\"\"$ is the radian measure of an angle, then all angles measuring $\"\"$ where $\"\"$ is an integer, are coterminal with $\"\"$ .

Let $\"\"$ .

Positive coterminal angle is $\"\"$ .

Draw a diagram for positive coterminal angle.

$\"\"$

Let $\"\"$ .

Negative coterminal angle is $\"\"$ .

$\"\"$

Positive coterminal angle is $\"\"$ .

$\"\"$

Negative coterminal angle is $\"\"$ .

$\"\"$