How to use the half angle formula to solve an equation

The video tutorial guides students through solving a trigonometric equation using the half-angle formula. It begins by setting up the problem and isolating terms. The instructor then demonstrates how to solve the equation by applying trigonometric identities and factoring. Finally, the video emphasizes the importance of checking for extraneous solutions to ensure the validity of the results.

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