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Math Help - Integration by substitution

  1. #1
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    Exclamation Integration by substitution

    Find u and du

    The indefinite integral sec2xtan2xdx


    I need help telling the derivative from the function apart.
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  2. #2
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    Quote Originally Posted by saraduh View Post
    Find u and du

    The indefinite integral sec2xtan2xdx


    I need help telling the derivative from the function apart.
    Try u = \sec{2x}
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  3. #3
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    Would this work?


    sec2xtan2xdx = sin2x dx/(cos2x)^2

    let u = cos2x---> du = -2sin2xdx
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  4. #4
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    Quote Originally Posted by saraduh View Post
    Would this work? Mr F says: Yes. Good idea.


    sec2xtan2xdx = sin2x dx/(cos2x)^2

    let u = cos2x---> du = -2sin2xdx
    ..
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