Hello!

I am having trouble deriving y = cot(arctan(x))

I got dy/dx = [-1+tan^2(arctan(x))]/[tan^2(arctan(x))(1+x^2)]

I used the chain rule for the overall equation, and I also used

Does this look correct? Or am I way off? Perhaps, can this be simplified further?

Any help is much appreciated,

Dranalion