Solving for y: x=tan(y*pi/2) then, y=2/p1*(arctan(x))
so, lets now let g(x)=2/p1*(arctan(x))
Sorry, the notation is messy. Basically I'm just trying to find the compositions of f(x) and g(x). So, g o f and f o g. I have gone blank on my trig and my calc is giving me all kinds of wierd results.