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Thread: Derivative

  1. November 2nd 2009, 12:19 PM #1
    Asuhuman18
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    Derivative

    find f'(x) if
    f(x)=sinh(cosh(x))

    isnt this just...

    cosh(cosh(x))*-sinh(x)???
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  2. November 2nd 2009, 12:24 PM #2
    Grandad
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    Hello Asuhuman18
    Quote Originally Posted by Asuhuman18 View Post
    find f'(x) if
    f(x)=sinh(cosh(x))

    isnt this just...

    cosh(cosh(x))*-sinh(x)???
    No. The derivative of \cosh(x) is \sinh(x), not -\sinh (x). So the answer is \cosh(\cosh(x))\sinh(x).

    Grandad
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