Answer
$720°$
Work Step by Step
To convert from radians to degrees, multiply by $\frac{180}{\pi}$:
$4\pi\times\frac{180}{\pi}=720°$
Calculus 8th Edition
by Stewart, James
Published by
Cengage
ISBN 10:
1285740629
ISBN 13:
978-1-28574-062-1
Appendix D - Trigonometry - D Exercises - Page A32: 7
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