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Thread: indefinate integrals

  1. #1
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    indefinate integrals

    Hiya,
    I'm a first year maths student and I'm really struggling with the calculus and vectors module. I'm getting extra tutoring but I have a lot of work due in before my next session and I'm pretty clueless so any help would be much appreciated!

    The first question I'm stuck with is:

    evaluate the indefinate integral, t sin(t^2) e^(1+2cost^2) dt

    I have no idea where to start so if anyone has time to take me through from basics that would be great. Thank you!
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by KerryClaire View Post
    Hiya,
    I'm a first year maths student and I'm really struggling with the calculus and vectors module. I'm getting extra tutoring but I have a lot of work due in before my next session and I'm pretty clueless so any help would be much appreciated!

    The first question I'm stuck with is:

    evaluate the indefinate integral, t sin(t^2) e^(1+2cost^2) dt

    I have no idea where to start so if anyone has time to take me through from basics that would be great. Thank you!
    do a u-substitution, u = 1 + 2 \cos (t^2)

    can you continue? In retrospect, do you see why this makes sense?
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