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Math Help - integrating a sin function

  1. #16
    MHF Contributor
    skeeter's Avatar
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    Re: integrating a sin function

    well, you do know the antiderivative of a constant ... that's a start.

    fyi ...

    \int \sin{x} \, dx = -\cos{x} + C

    \int \cos{x} \, dx = \sin{x} + C

    ... you should already know the two above if you learned the derivatives of sine and cosine.


    and for any constant k ...

    \int \sin(kx) \, dx = -\frac{1}{k}\cos(kx) + C

    \int \cos(kx) \, dx = \frac{1}{k}\sin(kx) + C

    ... and these two should make sense if you understand the chain rule for derivatives.
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  2. #17
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    Re: integrating a sin function

    heyy i did it a bit differently to u but and i came up with the right answer.

    does it still work?? integrating a sin function-photo.jpg
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