25 setxunit
7.5 setborder
90 setangle_repere
-5 15 setxrange
-5 5 setyrange
/quadrillagegray 0.4 def
1 setquadrillagexstep
1 setquadrillageystep
quadrillage
1 1 settkstep
.5 .5 setsubtkstep
2 2 setmkstep
ticks
subticks
marks
traceaxes
axesarrow
.75 setlinewidth
continu
bleu
/X {settvar
#rpn# (Cos (t))^2 - ln (abs (Sin (t)))
} def
/Y {settvar
#rpn# Sin (t)
} def
10 neg 10 {X} {Y} Courbeparam
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