All the different ways to apply identities and then see which one works

The video tutorial explores the process of simplifying mathematical expressions, particularly focusing on trigonometric functions like tangent and cosine. It discusses the use of identities, such as reciprocal and quotient identities, to simplify expressions. The tutorial emphasizes the effectiveness of converting expressions to sines and cosines for simplification. It also touches on variable manipulation, cautioning against using unrelated variables without context.

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