Q:

Use two functions for x and y coordinates for a plot

I try to make a plot out of two functions. It is a cycloid I want to plot. These are my two functions: 
posPv[t_] = radius*(1 - Cos[2 π*t])
posPh[t_] = radius*(2 π*t - Sin[2 π*t])

Does anybody know how to do this. I couldn't find anything about it in the documentation.

A:

ParameticPlot is what you are looking for.
With[{r = 1}, 
  ParametricPlot[r {2 π t - Sin[2 π t], 1 - Cos[2 π t]}, {t, 0, 2}]]

