Factoring a trigonometric expression

The video tutorial covers the process of factoring expressions, particularly those involving trigonometric functions. It emphasizes the importance of understanding basic factoring techniques and how they can be applied to more complex expressions. The instructor demonstrates how to simplify trigonometric expressions by using identities and converting them into familiar variable-based forms. The tutorial also provides strategies for factoring efficiently and highlights the benefits of using variables to simplify the process. By the end, viewers should be able to factor expressions quickly and accurately.

What is the final factored expression for the problem discussed in the text?

Why is it suggested to use variables like X and Y when factoring trigonometric expressions?