How to multiply two trigonometric binomials using difference of two squares

The video tutorial explains how to multiply binomials efficiently by recognizing patterns, specifically focusing on the difference of two squares. It demonstrates how to simplify expressions by factoring and using the Pythagorean identity. The tutorial emphasizes avoiding lengthy processes like FOIL by identifying shortcuts and applying mathematical identities.

What is the final expression after factoring out the common term from 4 cosecant squared of X - 4?

How does the Pythagorean identity relate to cosecant squared of X?