25 setxunit
7.5 setborder
90 setangle_repere
-5 50 setxrange
-5 50 setyrange
1 1 settkstep
.5 .5 setsubtkstep
2 2 setmkstep
ticks
subticks
marks
traceaxes
axesarrow
.75 setlinewidth
continu
bleu
/X {settvar
#rpn# 1/sin(3*t/2)
} def
/Y {settvar
#rpn# 1/sin(t)
} def
0.1 2 pi mul 3.001 div {X} {Y} Courbeparam
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