set terminal png medium size 480,480
set output "cardioide.png"
set parametric
set size ratio 1
set zeroaxis ls 1
plot cos(t)+0.5*cos(2*t),sin(t)+0.5*sin(2*t) notitle with line lc "black" lw 2
set output
1' di lettura
3,5
/
5
(2)
