Présentation de 11456.jps

25 setxunit
7.5 setborder
-15 15 setxrange
-15 15 setyrange
jpegmode
/a 5 def
/b 1 def
/c 5 def
/resolution 500 def
      
2 2 settkstep
1 1 setsubtkstep
2 2 setmkstep
ticks
traceaxes
axesarrow
unites
.75 setlinewidth
continu
bleu
/X {settvar
    a b add t Cos mul c t 1 a b div add mul Cos mul sub
} def
/Y {settvar
    a b add t Sin mul c t 1 a b div add mul Sin mul sub
} def
  0  20 pi mul {X} {Y} Courbeparam