Answer
A circle with radius $\sqrt5$, centered at $(0,0)$.
Work Step by Step
$r^2=5$
Since $r^2=x^2+y^2$, we get:
$x^2+y^2=5$
This is the circle formula ($x^2+y^2=r^2$) and describes a circle with radius $\sqrt5$, centered at $(0,0)$.
Calculus 8th Edition
by Stewart, James
Published by
Cengage
ISBN 10:
1285740629
ISBN 13:
978-1-28574-062-1
Chapter 10 - Parametric Equations and Polar Coordinates - 10.3 Polar Coordinates - 10.3 Exercises - Page 706: 15
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