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Math Help - derivatives with trigonometric functions

  1. #1
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    derivatives with trigonometric functions

    Use the equations and relations given below to answer the following questions.

    given

    f(pi/6) = 10
    f'(pi/6) = -4
    h(x) = (-sin(x)/f(x))

    what is h'(pi/6) = ?
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  2. #2
    Junior Member
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    Oct 2009
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    never mind, i just had to use the quotient rule, and find out the derivative of -sin(x) is -cos(x).
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