Calculus 8th Edition

Published by Cengage
ISBN 10: 1285740629
ISBN 13: 978-1-28574-062-1

Chapter 10 - Parametric Equations and Polar Coordinates - 10.4 Areas and Lengths in Polar Coordinates - 10.4 Exercises - Page 713: 42

Answer

Pole intersections at the different values of $\theta$ are written as: $$(\frac{\pi}{4},0),(\frac{3\pi}{4},0),(\frac{5\pi}{4},0),(\frac{6\pi}{4},0),(0,0), (\frac{\pi}{2},0),(\frac{3\pi}{2},0)$$

Work Step by Step

Given: $$sin2\theta=cos2\theta$$ Thus, $$\theta=\frac{\pi}{8},\frac{9\pi}{8}$$ Pole intersections at the different values of $\theta$ are written as: $$(\frac{\pi}{4},0),(\frac{3\pi}{4},0),(\frac{5\pi}{4},0),(\frac{6\pi}{4},0),(0,0), (\frac{\pi}{2},0),(\frac{3\pi}{2},0)$$
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