Curve defined in polar coordinates : plotpolar polarplot DrawPol courbe_polaire

Let E_t be an expression depending of the variable t.
plotpolar(E_t,t) draws the polar representation of the curve defined by $\rho$ = E_t for $\theta$ = t, that is in cartesian coordinates the curve (E_tcos(t), E_tsin(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.
Input

plotpolar(t,t)

Output :

The spiral $\rho$=t is plotted

Input

plotpolar(t,t,tstep=1)

or :

plotpolar(t,t=0..10,tstep=1)

Output :

A polygon line approaching the spiral $\rho$=t is plotted