Find the angle given inverse secant

The video tutorial explains how to find angles using inverse trigonometry, focusing on secant and cosine functions. It guides viewers through rewriting secant as cosine, solving for theta using cosine inverse, and understanding the unit circle to determine angles where cosine equals -1. The tutorial emphasizes the importance of recognizing reciprocal functions and domain restrictions in trigonometry.

What are the domain restrictions for the cosine function?

Explain how to determine the angle that gives a cosine value of -1 on the unit circle.