Please simplify:

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

Thank you!

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- Nov 9th 2008, 01:20 PMgearshifterSimplifying Trig
Please simplify:

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

Thank you! - Nov 9th 2008, 01:28 PMskeeter
$\displaystyle \cos^2\left[\cos^{-1}\left(\frac{6}{x}\right)\right] = \left(\frac{6}{x}\right)^2$