Simplifying Trig Expressions By Factoring ex 3

The video tutorial explains how to factor expressions by identifying common terms, specifically focusing on the cosine of Theta. It demonstrates transforming expressions into quadratic trinomials and further factoring them into binomials. The process involves substituting variables and verifying the results by multiplying back to the original expression.

What substitution is made for sine of Theta in the factoring process?

What are the two numbers that multiply to give -2 in the quadratic trinomial?