PatKIfF1z setxyrapport
25 setxunit
7.5 setborder
-6 6 setxrange
-6 6 setyrange
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2 2 settkstep
1 1 setsubtkstep
2 2 setmkstep
ticks
traceaxes
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unites
0.75 setlinewidth
continu
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/X {settvar
#rpn# a * Cos (t)
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/Y {settvar
#rpn# b * Sin (t)
} def
0 2 pi mul {X} {Y} Courbeparam