Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 8 - Application of Trigonometry - 8.7 Polar Equations and Graphs - 8.7 Exercises: 3

Answer

$\pm \sqrt {2}$

Work Step by Step

$r^{2}=4\sin 2\theta \Rightarrow r^{2}=4\sin \left( 2\times 15\right) =4\times \sin 30=2\Rightarrow r=\pm \sqrt {2}$
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