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Math Help - Integral help

  1. #1
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    Integral help

    Integral of sin(3x) / cos^3(3x) dx
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  2. #2
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    Quote Originally Posted by element View Post
    Integral of sin(3x) / cos^3(3x) dx
    \frac{\sin{3x}}{\cos^3{3x}} = \tan{(3x)}\sec^2{(3x)}

    Can you do it now?
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  3. #3
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    Quote Originally Posted by Chop Suey View Post
    \frac{\sin{3x}}{\cos^3{3x}} = \tan{(3x)}\sec^2{(3x)}

    Can you do it now?
    Thanks, I can't believe I didn't see that. I tend to think too hard in my DE class.
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