Answer
$r=-\sec\theta$
Work Step by Step
$x=-1$
Putting $x=r\cos\theta$, we get
$r\cos\theta=-1$
$\implies r=-\frac{1}{\cos\theta}=-\sec\theta$
Calculus: Early Transcendentals 9th Edition
by Stewart, James
Published by
Cengage Learning
ISBN 10:
1337613924
ISBN 13:
978-1-33761-392-7
Chapter 10 - Section 10.3 - Polar Coordinates - 10.3 Exercises - Page 692: 22
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