Answer
$\frac{7\pi}{6}$
Work Step by Step
To convert from degrees to radians, multiply the angle by $\frac{\pi}{180}$:
$210\times \frac{\pi}{180} = \frac{7\pi}{6}$.
Calculus: Early Transcendentals 8th Edition
by Stewart, James
Published by
Cengage Learning
ISBN 10:
1285741552
ISBN 13:
978-1-28574-155-0
APPENDIX D - Trigonometry - D Exercises - Page A 32: 1
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