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Math Help - Reduction Method

  1. #1
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    Exclamation Reduction Method

    Hi

    How would I do this question:
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  2. #2
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    Quote Originally Posted by xwrathbringerx View Post
    Hi

    How would I do this question:
    http://www.wolframalpha.com/input/?i=integral[%28Sin[Pi%2F4+-+3x]%29^4]

    Click on "Show Steps"
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  3. #3
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    Exclamation

    Could someone please please show me where I got it wrong in my working out????
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  4. #4
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    simplify by letting t = pi/4 - 3theta -1/3 dt = dtheta

    then apply reduction formula
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  5. #5
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    Exclamation

    is the reduction formula in my working out actually right?
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