Calculus (3rd Edition)

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

Chapter 12 - Parametric Equations, Polar Coordinates, and Conic Sections - 12.3 Polar Coordinates - Exercises - Page 617: 11


$$ x^{2}+y^{2} =49$$

Work Step by Step

Since \begin{align*} r&=\sqrt{x^{2}+y^{2}}\\ r^{2}&=x^{2}+y^{2} \end{align*} Then $$ x^{2}+y^{2} =49$$
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