# Trigonometry....sine, cosine, tangent question?

Verify that the equation is an identity

( (tan^2 x) / (csc^2 x + sec^2 x) ) = sin^2 x - sin^2 x cos^2 x

( (tan^2 x) / (csc^2 x + sec^2 x) ) = sin^2 x - sin^2 x cos^2 x

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