We are to find the positive and negative angles that are coterminal with

By definition
Coterminal Angles are angles that share the same initial side and terminal sides. Finding coterminal angles is as simple as adding or subtracting 360° or 2π to each angle, depending on whether the given angle is in degrees or radians
Hence,
The positive coterminal angle is

Simplifying this we get

Therefore, the positive coterminal angle is

The negative coterminal angle is

Therefore, the negative coterminal angle is
