ParametricPlot

ParametricPlot[{fx, fy}, {u, umin, umax}] generates a parametric plot of a curve with x and y coordinates as functions of u.

Examples

Plot a circle:

ParametricPlot[{Cos[t], Sin[t]}, {t, 0, 2 Pi}]

Plot a spiral:

ParametricPlot[{t Cos[t], t Sin[t]}, {t, 0, 4 Pi}]

Please visit the official Wolfram Language Reference for more details.