Answer
$\frac{2\pi}{3}$
Work Step by Step
If $s\in[\frac{\pi}{2},\pi]$, it is in quadrant II, with $sin(s)=\frac{\sqrt 3}{2}$, we have $s=\frac{2\pi}{3}$
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 - Quiz - Page 616: 8
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