Présentation de 2585.jps

/syracuse/bbgraf/tmp/2585.jpg
25 setxunit 7.5 setborder 90 setangle_repere -5 5 setxrange -5 5 setyrange 1 1 settkstep .5 .5 setsubtkstep 2 2 setmkstep ticks subticks marks traceaxes axesarrow /R {settvar #rpn# 3*Cos(t/4) } def 0 4 pi mul settrange gsave .75 setlinewidth continu bleu (R) courbepolar grestore