How to evaluate the inverse of trigonometric functions with unit circle

The video tutorial covers inverse trigonometric functions, focusing on cosine and tangent. It explains how to rewrite trigonometric equations using inverse functions and the importance of understanding the unit circle to find angles. The tutorial also discusses the range of cosine and tangent functions and how to determine angles using inverse tangent and coterminal angles.

What does it mean to 'undo' a function in trigonometry?

When is the cosine equal to -1?

How do you find the inverse tangent of a value?

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