Find parametric equations for the arc of a circle of radius 9 from p=(0,0) to q=(18,0)
a) x(t) = 9cos(t) , y(t) = 9sin(t)
b) x(t) = 9sin(t) , y(t) = 9cos(t)
c) x(t) = 9sin(2t) , y(t) = 9cos(2t)
d) x(t) = 9cos(2t) , y(t) = 9sin(2t)