Can someone show me how i can prove this?

(d/dx)cot^-1 =-1/1+(x^2)

thanks in advance

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- Nov 18th 2009, 12:10 AMcpjproof of arccot(x)
Can someone show me how i can prove this?

(d/dx)cot^-1 =-1/1+(x^2)

thanks in advance - Nov 18th 2009, 12:31 AMRockHard
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

- Nov 18th 2009, 01:15 AMsimplependulum
If you know but not

Use this identity - Nov 18th 2009, 02:07 AMcpj
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.

- Nov 18th 2009, 03:04 AMsimplependulum