Answer
$r=\frac{2}{1+\cos \theta}$
Work Step by Step
Using Theorem with $e=1$ and $d=2$, and using part (a) of Figure 2, the parabola with the directrix $x=2$ and the focus at the origin has the equation $r=\frac{2}{1+\cos \theta}$.
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 10.6 - Conic Sections in Polar - 10.6 Exercises - Page 717: 1
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