How to evaluate the half angle for cosine in radians

The video tutorial explains how to determine the cosine of an angle in different quadrants, emphasizing that cosine is negative in the second quadrant. It walks through the process of calculating the value of U, inserting it into an equation, and determining the sign based on quadrant analysis. The tutorial concludes with an example calculation, reinforcing the concept of cosine's behavior in various quadrants.

What new insight or understanding did you gain from this video?

Evaluate responses using AI:

OFF