Draw Thomson cross section in polar plot by matlab

[Lisa!]

Well I'm supposed to draw Thomson cross section in polar plot by MATLAB software. Have I done it right? I mean does this figure that I got seem to be in polar plot or not?

t = 0:.01:2*pi;
r =  2.8179e-13
x =  t,0.5*power(r,2)*(1+power(cos(t),2))
polar(t,x)

Thanks

 

[Lisa!]

Have I posted it in the right place?