Answer:- A parametric equation of circle is the coordinates of a point on the circle in terms of a single variable ?. These single variables are called as parameter. The parametric equations of a circle with radius (r = 0) and center (h, k) are.Equiangular spiral describes a family of spirals of one parameter. It is defined as a curve that cuts all radial line at a constant angle.It also called logarithmic spiral, Bernoulli spiral, and logistique.

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