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Curve defined in polar coordinates : plotpolar polarplot DrawPol courbe_polaire

Let Et be an expression depending of the variable t.
plotpolar(Et,t) draws the polar representation of the curve defined by $ \rho$ = Et for $ \theta$ = t, that is in cartesian coordinates the curve (Etcos(t), Etsin(t)). The range of the parameter may be specified by replacing the second argument by t=tmin..tmax. The discretisation parameter may be specified by an optional tstep=... argument.
Output :
The spiral $ \rho$=t is plotted
or :
Output :
A polygon line approaching the spiral $ \rho$=t is plotted

giac documentation written by Renée De Graeve and Bernard Parisse