Finding The Curvature Of A Polar Function.

[Baumer8993]

Homework Statement

Find the curvature of the polar function r = 5sin(2θ).

Homework Equations

All of the usual curvature equations.

The Attempt at a Solution

I want to turn this into a vector value function, so I can use the normal curvature equations, but that seems worse. I am having trouble with where to start.

 

[Dick]

Just let θ be the parameter. So e.g. x(θ)=r*cos(θ)=5sin(2θ)*cos(θ).