Answer
$\dfrac{4\pi}{3}$
Work Step by Step
We know that $360^\circ=2\pi$ radians.
Hence,
$240^\circ=240^o \cdot \dfrac{2\pi}{360^o}=\dfrac{4\pi}{3}$
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 9 - Polar Coordinates; Vectors - 9.3 The Complex Plane; De Moivre's Theorem - 9.3 Assess Your Understanding - Page 595: 72
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