Answer
$240^{\circ}=\dfrac{4 \pi}{3}$
Work Step by Step
Using $\pi=180^{\circ}$, we have
$240^{\circ}=180^{\circ}+60^{\circ}$
$=\pi+\dfrac{\pi}{3}$
$=\dfrac{3 \pi+\pi}{3}$
$=\dfrac{4 \pi}{3}$
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Chapter 8 - Polar Coordinates; Vectors - Section 8.3 The Complex Plane; De Moivre's Theorem - 8.3 Assess Your Understanding - Page 616: 71
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