parametric equations for regular polygons


    Aug 04 2012 | 10:28 am
    in the title is described for what I'm looking for:
    parametric equations for n - regular polygons (n = 3,4,5...)
    for example: the parametric equations by a circle are:
    x(t) = r * cos(t) y(t) = r * sin(t)
    we need these parametric equations in the expr object
    thank you for your further help and assistance...