I had to use integration by parts..Anyone mind checking my answers :P

1) int from 0 to pi/4 xsin(2x) dx = 1/4

2) int from 0 to 1 arctanx dx = 0.4388

3) int sin(lnx) dx = sin(lnx)e^(lnx) - cos(lnx)e^(lnx) / (1-e^(lnx))

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- Sep 10th 2008, 07:28 PMBeeorzIntegration by parts -- check my answers plz
I had to use integration by parts..Anyone mind checking my answers :P

1) int from 0 to pi/4 xsin(2x) dx = 1/4

2) int from 0 to 1 arctanx dx = 0.4388

3) int sin(lnx) dx = sin(lnx)e^(lnx) - cos(lnx)e^(lnx) / (1-e^(lnx)) - Sep 10th 2008, 09:07 PMmr fantastic