PolarPlot

PolarPlot[r, {θ, θmin, θmax}] generates a polar plot of a curve with radius r as a function of angle θ.

PolarPlot[{r1, r2, …}, {θ, θmin, θmax}] makes a polar plot of curves with radius functions r1, r2, ….

Examples

Plot a spiral:

PolarPlot[θ, {θ, 0, 4 Pi}]

Rose curve:

PolarPlot[Sin[3 θ], {θ, 0, Pi}]

Please visit the official Wolfram Language Reference for more details.