# Derivative: arctan(sqrt((1-x)/(1+x)))

cgrumiea

## Homework Statement

Find the derivative:
arctan$$\sqrt{(1-x)/(1+x)}$$

## Homework Equations

Chain Rule, Quotient Rule

## The Attempt at a Solution

I've gotten to a point where I feel like I either don't know how to simplify from this point, or I've done something wrong:
[1/(1+((1-x)/(1+x)))] * [(-$$\sqrt{(1+x)}$$/2*$$\sqrt{1-x}$$)-($$\sqrt{1-x}$$/2*$$\sqrt{1+x}$$)]