Calculus (3rd Edition)

Published by W. H. Freeman
ISBN 10: 1464125260
ISBN 13: 978-1-46412-526-3

Chapter 14 - Calculus of Vector-Valued Functions - 14.4 Curvature - Preliminary Questions - Page 734: 6



Work Step by Step

Generally, the radius of curvature is $\frac{1}{\kappa}$. The curvature of a circle with radius $4$ is $\frac{1}{4}$. So the radius of curvature of a circle of radius $4$ is equal to $\frac{1}{1/4}=4$.
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