# Inverse Trig function derivative

1. Nov 22, 2007

### EvilBunny

1. The problem statement, all variables and given/known data

Let

arctan ($$\sqrt{3x^2 -1}$$)

then dy/dx

Well I know that the derivative of arctanx is

1/ 1 + x ² but when I got something other then simply x I don't know how to proceed

2. Nov 22, 2007

### rocomath

x=the radical

example

$$y=\arctan{(x^2)}$$

$$y'=\frac{2x}{1+(x^2)^2}$$

3. Nov 22, 2007

### EvilBunny

Neat I get it, thanks.

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