# Math Help - hi everyone

1. ## hi everyone

could you help me i can't find the derivative of( pi/2+x+arctan1/x)

2. It's just basic stuff that you should know about differentiation.

$f'(x)=\frac1{1+x^2},$ where $f(x)=\arctan x;$ and $f'(x)=1,$ where $f(x)=x.$ Plus, chain rule is involved here.