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Math Help - Finding the Integral of sin(x)*cos(x)

  1. #1
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    Finding the Integral of sin(x)*cos(x)

    The Problem was:

    What is the integrale from 2.0;0 (sin(x)*cos(x) +1)

    The question really is how do you integrate sin(x) multiplied with another funktion? I tried to reverse derivate but that did not work. The answer is suppose to be 2,41
    Thanks alot in advance.
    With kind regards Henry from Sweden.
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  2. #2
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    Hello Henry,

    You can try substituting  u = \cos(x) \Rightarrow du = -\sin(x)dx
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  3. #3
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    SinxCosx=0.5Sin2x

    Instead\ of\ integrating\ the\ product,\ just\ integrate\ Sin2x
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