Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 6 - Trigonometric Functions - 6.1 Angles and Their Measure - 6.1 Assess Your Understanding - Page 361: 7


$\pi$ radians

Work Step by Step

As we know that $1^{\circ}=\frac{\pi}{180}$ $\implies 180^{\circ}=180\times \frac{\pi}{180}$ $\implies 180^{\circ}=\pi$ radians
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