Question

Find radius of curvature at any point
s=aψ​

Answer 1

Answer:

s=aψ

$let \: s \: = a ψ \\ diff.wrt \: to \: \psi \\ \frac{ds}{d \psi} = a \\ radius \: of \: curvature \: is \: \\ = a$

Answer 2

$\huge\bf{Answer:-}$

Refer the attachment