Présentation de 2618.jps

/syracuse/bbgraf/tmp/2618.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# 1/Sin(t/2) } def 3 neg 12 settrange gsave .75 setlinewidth continu bleu (R) courbepolar grestore