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Math Help - Integral Help

  1. #1
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    Integral Help

    Hi ALL !!!

    Someone can help me with this question ??

    \int_{\frac{\pi}{2}}^{\fracp{x}{2}}\sin(\cos(t))dt

    I thought use that:

     \sin(\cos(t)) = \cos(\frac{pi}{2} - \cos(t))

    Is it correct ??

    Thanks a lot...
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  2. #2
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    Re: Integral Help

    Quote Originally Posted by Borseti View Post
    Hi ALL !!!

    Someone can help me with this question ??

    \int_{\frac{\pi}{2}}^{\fracp{x}{2}}\sin(\cos(t))dt

    I thought use that:

     \sin(\cos(t)) = \cos(\frac{pi}{2} - \cos(t))

    Is it correct ??
    is the integral ...

    \int_{\frac{\pi}{2}}^{\frac{x}{2}}\sin(\cos(t))dt

    ???

    ... and what are you supposed to do with it?
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  3. #3
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    Re: Integral Help

    I've done !!!

    I use that sin(cos(t)) is a primitive of F(t), then  \int_{\frac{pi}{2}}^{\frac{x}{2}} \sin(\cos(t))dt = F(\frac{x}{2}) - F(\frac{pi}{2}) .
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  4. #4
    MHF Contributor Siron's Avatar
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    Re: Integral Help

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