Simplifying a rational trigonometric identity using pythagoren identities

The video tutorial explains the process of simplifying trigonometric expressions using Pythagorean identities. It begins with an introduction to these identities, focusing on sine squared plus cosine squared equals one. The tutorial then demonstrates how to transform expressions to have a monomial denominator by solving for sine squared and combining terms. Finally, it shows how to simplify the expression to derive cotangent, emphasizing the importance of understanding trigonometric identities and simplification techniques.

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