Verify trigonometric identities by using pythagorean identities

The video tutorial covers trigonometric identities, focusing on recognizing and applying Pythagorean identities. It explains how to verify identities by equating both sides of an equation, using examples like sine squared plus cosine squared equals one. The tutorial emphasizes understanding the relationships between different trigonometric functions and their identities.

What is the significance of writing the equal sign when working with trigonometric identities?

How do you verify that the left side of an equation is equivalent to the right side?