Precalculus (6th Edition) Blitzer

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

Chapter 6 - Section 6.4 - Graphs of Polar Equations - Concept and Vocabulary Check - Page 753: 5


To test whether the graph of a polar equation may be symmetric with respect to the pole (origin), replace $r$ with $-r$.

Work Step by Step

When r is replaced by – r and the resultant polar equation is equivalent to given polar equation then a graph of a polar equation exhibits symmetry with respect to the pole (origin). You may be able to graph it more quickly.
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