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Math Help - Simplifying Trig

  1. #1
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    Simplifying Trig

    Please simplify:

    cos^2(cos^(-1)(6/x))

    Thank you!
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  2. #2
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    \cos^2\left[\cos^{-1}\left(\frac{6}{x}\right)\right] = \left(\frac{6}{x}\right)^2
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