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Math Help - Evaluate the Integral

  1. #1
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    Evaluate the Integral

    I am having a hard time doing this.

    Use substitution and the results you established to evaluate the integral:

    the integral is sin(2x) / (2 + cos(x))

    The results I established are :

    cos(x) = (1 - t^2) / (1 + t^2)
    sin (x) = 2t / (1 + t^2)
    dx = (2 / (1+ t^2)) dt

    Help please!

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  2. #2
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    Re: Evaluate the Integral

    It looks like you need the trigonometric identity sin(2x) = 2sin(x)cos(x).

    After some simplification, you can integrate using partial fractions.

    - Hollywood
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  3. #3
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    Re: Evaluate the Integral

    Evaluate the Integral-05-feb-14.png
    Thanks from MINOANMAN
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