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Math Help - How to differentiate a trig function

  1. #1
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    How to differentiate a trig function

    This problem is giving me, well...problems:

    2x^2 tan(x)
    -------------- = f(x)
    sec (x)

    not sure how im supposed to differentiate this at all.
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  2. #2
    Math Engineering Student
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    Quote Originally Posted by pseizure2000 View Post
    2x^2 tan(x)
    -------------- = f(x)
    sec (x)
    \frac{\tan x}{\sec x}=\sin x, therefore it remains to differentiate f(x)=2x^2\sin x

    Does that make sense?
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  3. #3
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    Quote Originally Posted by pseizure2000 View Post
    This problem is giving me, well...problems:

    2x^2 tan(x)
    -------------- = f(x)
    sec (x)

    not sure how im supposed to differentiate this at all.
    \frac{\tan x}{\sec x} = \frac{\sin x / \cos x}{1/\cos x} = \sin x.

    Thus we have,
    2x^2\sin x.
    Which is simpler.

    This is Mine 73th Post!!!
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  4. #4
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    thanks didn't catch that at all!
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