Learn how to determine the reference angle of an angle in terms of pi

The video tutorial explains the concept of reference angles, defining them as the acute positive angle between the X axis and the terminal side. It demonstrates how to graph angles in radians, specifically using π, and breaks down the process of calculating reference angles. The tutorial also covers the concept of Theta prime, explaining its significance and calculation as π/6 in the context of a given angle.

Explain how to determine the reference angle from the terminal side.

Why is the reference angle always positive?