Answer
$r=\frac{sin \theta}{\theta}$, $r \to 0$ as $\theta \to \infty $. See the attached graph.
Work Step by Step
$r=\frac{sin \theta}{\theta}$, $r \to 0$ as $\theta \to \infty $. The curve resembles an oscillating curve becoming flatter and flatter as $r$ increases. See the attached graph.
