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))
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))