Can someone show me how i can prove this? (d/dx)cot^-1 =-1/1+(x^2) thanks in advance
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I would like to know this as well, would doing the integral of his solution be a way to provide some sort of "proof" by using the identity
If you know but not Use this identity
thanks, but would it be possible for you to elaborate, maybe show some working, i'm not sure how to use that identity to help with the proof.
Originally Posted by simplependulum If you know but not Use this identity sure We have -(1) Let -(2) , it is to eliminate
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