## Calculus 8th Edition

Published by Cengage

# Chapter 10 - Parametric Equations and Polar Coordinates - Review - Exercises - Page 730: 13

#### Answer

The graph of $r=1+cos2\theta$ is as shown.

#### Work Step by Step

$$r=1+cos2\theta$$ When graphing polar equations, we need to look at the position of $r$ where it is is zero and switches from positive to negative to help with drawing the loops. This is depicted in the attached graph.

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