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Math Help - more derivatives...help!

  1. #1
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    more derivatives...help!

    (x) = sin^2(x) - cos(x) on the interval 0 x .

    ok so can you point me in the right direction for this one, and also how to find the local and global maximums...thanks...
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  2. #2
    MHF Contributor
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    Point you only to the right direction?

    Get the f'(x), or the 1st derivative of f(x).
    Set it to zero to get the critical points. There shpould be 3 of them in that interval.
    The highest f(x) among the 3 is the global maximum. It is at x = 2pi/3.
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