Answer
$x^2 + y^2 = 4$
Work Step by Step
$r = 2$
$r^2 = 2^2$ (Squaring both sides)
$r^2 = 4$
$x^2 + y^2 = 4$ (since $r^2 = x^2 + y^2$)
The equivalent equation in rectangular coordinates is $x^2 + y^2 = 4$
Trigonometry (10th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671775
ISBN 13:
978-0-32167-177-6
Chapter 8 - Review Exercises - Page 405: 59
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