Using the period as an aide evaluate the function for the given trig function

The video tutorial explains how to evaluate problems using the unit circle, focusing on negative direction examples. It covers simplifying angles by understanding revolutions and factoring out redundancies. The concept of coterminal angles is discussed, emphasizing the importance of finding the smallest angle to reach a point. The tutorial includes practical examples and encourages students to memorize key coordinate points for solving homework problems.

Describe how to find the sine of an angle in the unit circle.

What is the relationship between sine values and Y coordinates on the unit circle?

What is the significance of coterminal angles in relation to the unit circle?