5.4:  Trig Functions Defined on the Unit Circle

Introduction to the unit circle and trig functions of real numbers

Finding trig functions of an angle given a point on the unit circle

Filling in the unit circle

Using the unit circle to evaluate trig functions

This video shows how to use the unit circle to find exact values of trig functions of special angles.

Introduction to even and odd trig functions

Even and odd trig function examples