The video tutorial explains how to simplify a trigonometric expression involving beta. It starts by multiplying cosine and tangent, then uses trigonometric identities to simplify the expression. The Pythagorean identity is applied to further simplify, resulting in a negative cosine squared expression. The tutorial concludes with a final simplification and explanation of the process.

Explain how the difference of two squares is applied in the simplification process.

What is the relationship between sine and cosine as described in the text?

What is the Pythagorean identity mentioned in the text?

How does the text describe the simplification of sine squared of beta minus one?

What conclusion can be drawn about sine squared of beta in relation to cosine squared?