Question

Find the derivative of inversetan(x) ?

Answer 1

it should be right in your text. are you trying to get it from scratch?

Answer 2

no not from the definition just the shortcut of what it is

Answer 3

\[\frac{d}{dx} \tan^{-1}x=\frac{1}{x^2+1}\]
this should be one that you just know.

Answer 4

okay, i see. thank you!

Answer 5

wow, this thing is pretty awesome..

Answer 6

(newbie)

Answer 7

what agreen said

Answer 8

Yeah! what i said! :D

Answer 9

it is hard to do using the definition, but not hard if you know that
\[\frac{d}{dx}f^{-1}(x)=\frac{1}{f'(f^{-1}(x))}\]

Answer 10

Which you can get from \[f(f ^{-1}(x))=x\]. This is what i usually remember.