Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 9 - Section 9.6 - Conic Sections in Polar Coordinates - Exercise Set - Page 1030: 20


See graph and explanations.

Work Step by Step

Step 1. Rewrite the given equation as $r=\frac{4}{1-cos\theta}$ and compare with one of the standard forms. Step 2. We can identify $e=1, ep=4, p=4$; the conic is a parabola with directrix $x=-4$ Step 3. Based on the standard plot, with test values, we can graph the equation as shown in the figure.
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