$r' = \theta cos\theta$
Work Step by Step
$r = \theta sin\theta + cos\theta$ $r' = sin\theta + \theta cos\theta - sin\theta=\theta cos\theta$
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.