Présentation de 470.jps

100 setxunit
7.5 setborder
90 setangle_repere
-1.5 1.5 setxrange
-1.5 1.5 setyrange
1 1 settkstep
.5 .5 setsubtkstep
1 1 setmkstep
ticks
subticks
marks
traceaxes
axesarrow
/X {settvar
    t Sin
} def
/Y {settvar
    t Cos 2 t mul Cos mul
} def
gsave
   1.2 setlinewidth
   continu
   bleu
  0  2 pi mul {X} {Y} Courbeparam
grestore