I need help with the u-substituion. The first one is....

(2cosx)/(1-cos^2x)

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- May 13th 2010, 03:48 PMtbenne3U-Substitution
I need help with the u-substituion. The first one is....

(2cosx)/(1-cos^2x) - May 13th 2010, 03:49 PMChris L T521
- May 13th 2010, 03:57 PMtbenne3
- May 13th 2010, 04:09 PMskeeter
- May 13th 2010, 04:14 PMtbenne3
- May 13th 2010, 05:04 PMProve It
Notice that if then .

So

. - May 14th 2010, 04:16 AMTheCoffeeMachine
You can also let , then so then . Now since , then . So we have: