Question

How do you find the curvature (kappa) of a function f(x)? I know how to do it for vector valued functions namely: Given r(t) then k(t)=||r'(t)xr''(t)||/||r'(t)||^3

Answer 1

K(t)=||f''(t)||/[1+(f'(t))^2]^(3/2)

Answer 2

Thank you :) I had forgotten that :/