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Math Help - definite integrals

  1. #1
    Newbie
    Joined
    Mar 2008
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    4

    Unhappy definite integrals

    could someone please solve the following definite integrals please.

    <br />
\int_0^{\pi/2} ( sin4 \theta - cos4 \theta)~d\theta<br />

    <br />
\int_1^2(15x^3+e^2x-\frac{4}{x})dx<br />
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  2. #2
    Super Member Deadstar's Avatar
    Joined
    Oct 2007
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    722
    Well the integral of sin(4\Theta) is -\frac{1}{4}cos(4\Theta)

    And the integral of -cos(4\Theta) is -\frac{1}{4}sin(4\Theta)

    Does that help with the first one?
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