Calculus/Polar Differentiation< Calculus
We have the following formulae:
To find the Cartesian slope of the tangent line to a polar curve r(θ) at any given point, the curve is first expressed as a system of parametric equations.
Differentiating both equations with respect to θ yields
Dividing the second equation by the first yields the Cartesian slope of the tangent line to the curve at the point (r, r(θ)):