Présentation de 641.jps

/syracuse/bbgraf/tmp/641.jpg
25 setxunit 7.5 setborder -15 15 setxrange -15 15 setyrange jpegmode /a 5 def /b 4.5 def /c 6 def /resolution 500 def 2 2 settkstep 1 1 setsubtkstep 2 2 setmkstep ticks traceaxes axesarrow unites 0.75 setlinewidth continu bleu /X {settvar #rpn# (a+b) * Cos (t) - c * Cos (t*(1+a/b)) } def /Y {settvar #rpn# (a+b) * Sin (t) - c * Sin (t*(1+a/b)) } def 0 20 pi mul {X} {Y} Courbeparam