Given cosine, evaluate the half angle for sine

The video tutorial explains how to find the sine of U/2 given the cosine of U. It introduces the problem, applies the formula without needing a triangle, simplifies the expression, rationalizes the denominator, and discusses the importance of sign based on angle constraints. The tutorial emphasizes understanding the formula and the conditions under which the sine value is positive.

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

Evaluate responses using AI:

OFF