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## Homework Statement

Find the derivative:

arctan[tex]\sqrt{(1-x)/(1+x)}[/tex]

## 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)))] * [(-[tex]\sqrt{(1+x)}[/tex]/2*[tex]\sqrt{1-x}[/tex])-([tex]\sqrt{1-x}[/tex]/2*[tex]\sqrt{1+x}[/tex])]