How to simplify a trigonometric expression using difference of two squares

The video tutorial explores trigonometric identities, focusing on sine squared and cosine squared. It demonstrates transforming expressions using secant and tangent, applying the Pythagorean identity. The instructor explains the difference of squares method to simplify expressions, providing examples with powers. The tutorial concludes with a final simplification using identities and invites questions.

How can the difference of two squares be applied in the context of secant and tangent functions?

What is the final simplified form of the expression involving secant squared and tangent squared?