Présentation de 2645.jps

/syracuse/bbgraf/tmp/2645.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# 2/(1+2*Cos(t)) } def 0 1 5 pi mul settrange gsave .75 setlinewidth continu bleu (R) courbepolar grestore