math

Simplify and write the trigonometric expression in terms of sine and cosine:
tan^2 x-sec^2 x=

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  1. [(sin^2 x) / (cos^2 x)] - [1 / (cos^2 x)]

    [(sin^2 x) - 1] / (cos^2 x)

    -(cos^2 x) / (cos^2 x) = -1

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  2. since one of your basic trig identities is

    sec^2 x = 1 + tan^2 x

    this should not be too hard...

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    oobleck

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