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 is the first step taken to solve the equation involving the half angle formula?

Explain how to isolate the square root in the equation presented.

What relationship is used to rewrite sine in terms of cosine?

Describe the process of factoring the equation after setting it to zero.

What are the final solutions obtained after checking for extraneous solutions?