find an analytic function F where F' = f
f(z) = z-2
f(z) = ((z^4) +1)/(z^2)
f(z) = sinzcosz
I know I have to put these into the cauchy riemann equations but I don't know what to use for my du/dx or du/dy because I am not sure to use x-2 for my du/dx etc or if I am supposed to integrate...