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Math Help - derivative of trig function

  1. #1
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    derivative of trig function

    f(x) = (x^2)cosx
    f'(x) = 2xcosx - (x^2)sinx
    f''(x) = 2cosx - 4xsinx - (x^2)cosx

    Did I do the second derivative right?
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by saiyanmx89 View Post
    f(x) = (x^2)cosx
    f'(x) = 2xcosx - (x^2)sinx
    f''(x) = 2cosx - 4xsinx - (x^2)cosx

    Did I do the second derivative right?
    yup
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