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Math Help - The derivative of (secx)^2?

  1. #1
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    The derivative of (secx)^2?

    I know this is a lot simpler than I think it is, but I just had a brain lapse . Do any of you guys know what the he derivative of (secx)^2 is?
    Last edited by mr fantastic; May 2nd 2009 at 04:33 PM.
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  2. #2
    Senior Member Pinkk's Avatar
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    Chain rule:

    2sec(x)\cdot \frac{d}{dx}sec(x)
    2sec(x)\cdot sec(x)tan(x)
    2sec^{2}(x)tan(x)
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  3. #3
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    Quote Originally Posted by Pinkk View Post
    Chain rule:

    2sec(x)\cdot \frac{d}{dx}sec(x)
    2sec(x)\cdot sec(x)tan(x)
    2sec^{2}(x)tan(x)
    Haha, I knew it would be simple. Thanks man
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