I can't seem to get the correct answer for this: Find the indefinite integral by using the substitution x = tan(). integral x^2/(1+x^2)^2 dx Thanks
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tan(t) = x sec(t)^2 dt = dx tan(t)^2 * sec(t)^2 dt/(1+tan(t)^2)^2 tan(t)^2 * sec(t)^2 dt/(sec(t)^2)^2 tan(t)^2 dt /sec(t)^2 sin(t)^2 dt Integrate this using trigo identities on wikipedia.
Last edited by vincisonfire; Oct 15th 2008 at 07:30 AM.
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