Thread: ln(x),cos(x),sin(x),ex.
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Old June 2nd, 2009, 03:18 PM
putnam120 putnam120 is offline
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All of these seem to be solvable using substitution.

1) Try using u=\tan\left(\frac{x}{2}\right)

2) u=e^x-1

3) u=3x^2+2x-1
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