SOLUTION: Prove that Cos^2 x(1-sec^2 x) = -sin^2 x

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Question 916445: Prove that Cos^2 x(1-sec^2 x) = -sin^2 x
Answer by mananth(16946) About Me  (Show Source):
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Cos^2 x(1-sec^2 x) = -sin^2 x

Cos^2 x(Sec^2x-tan^2x-sec^2 x) = -sin^2 x

cos^2x * -tan^2x
cos^2x *-sin^2x/cos^2x
=-sin^2x