How to verify an identity with the sum and difference formulas

The video tutorial focuses on simplifying trigonometric identities by choosing the side with more operations to simplify. It emphasizes using sum and difference formulas for sine, cosine, and tangent of angles. The instructor demonstrates how to simplify expressions and verify that the left side of an equation equals the right side. The session concludes with addressing questions and clarifying doubts.

What conclusion does the teacher reach about the left and right sides of the equation?

Discuss the relationship between sine and cosine in the context of the teacher's explanation.