Polar Equation
A polar equation is an equation of a curve expressed in polar coordinates r=f(theta). A plot of a polar equation in the plane is known as a polar plot.
Some polar equations for simple curves are summarized in the following table.
curve origin polar equation
cardioid cusp r=1+costheta
circle center r=a
conic
section focus r=L/(1+ecostheta)
rose curve center r=sin(ntheta)
See also
Cartesian Equation, Polar Angle, Polar Coordinates, Polar Curve, Polar PlotExplore with Wolfram|Alpha
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Cite this as:
Weisstein, Eric W. "Polar Equation." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/PolarEquation.html