Answer
$\frac{\pi^2}{180}$
Work Step by Step
For an angle of $\pi^\circ$, we can find its radian measure as $\theta=\pi^\circ\times\frac{\pi}{180^\circ}=\frac{\pi^2}{180}$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 6 - The Circular Functions and Their Graphs - 6.1 Radian Measures - 6.1 Exercises - Page 574: 66
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