An equation whose are polar coordinates is called a polar equation.

An equation whose variables are polar coordinates is called a polar equation.

Step-by-step explanation:

Polar Equation--

A polar equation is a equation that describe the relationship between r and θ, where r is the distance from the pole to a point on a curve and θ is the angle subtended by that point with respect to the x-axis.

Hence, here r,θ acts as a variable of the equation.

So, we can change any rectangular equation in terms of variable x and y into the polar equation in terms of variable r and θ by using the transformation:

x=r cosθ   and   y=r sinθ.

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step-by-step explanation: