size 8.0 8.0 include "polarplot.gle" set font texcmr begin graph center title "r = 2cos(3\theta)" xaxis min -2 max 2 yaxis min -2 max 2 x2axis off y2axis off polar "2*cos(3*t)" 0 pi color red lwidth 0.04 under polar_grid 2 4 24 end graph