Recent content by colorado

  1. C

    Trigonometric substitution for x²/(4+x²)^(3/2)

    okay, so now I've got: (2) integral sec(t) - cos(t) Do I go ahead and take the integral at this pont? the integral of sec(t) involves (ln) and I don't believe that to be correct.
  2. C

    Trigonometric substitution for x²/(4+x²)^(3/2)

    Im not forgetting about the dx. I have been working on this for 2 hours now, please give me a little more than that. Here is what I have so far that I believe to be right: (2)integral tan^2(theta) / sec(theta)
  3. C

    Trigonometric substitution for x²/(4+x²)^(3/2)

    integrate (x^2) / (4+x^2)^(3/2) Im not allowed to apply hyperbolic functions to this and have been trying to solve applying to a 90 deg. angle. x = 2tan(theta) x^2 = 4tan^2(theta) dx = 2 sec^2(theta) Hopefully you can se where I am going with this (trigonomic substitution) Im...
  4. C

    Integrating x arccos(x) dx using integration by parts

    You are correct. Thankyou!
  5. C

    Integrating x arccos(x) dx using integration by parts

    This is a problem from my homework set. I'm so close but I'm tangled up at the end... Integrate/ x arccos(x)dx So far I am at (x^2)/2 arccosx - Int/ (x^2)/ (2 sqrt(x^2 - 1)) Can figure out how to integrate this part.
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