Answer
$\color{blue}{s\approx 1.4426}$
Work Step by Step
Use the inverse sine function of a calculator in radian mode, then round-off the answer to four decimal places to obtain:
$s=\sin^{-1}{(0.9918)} \color{blue}{\approx 1.4426}$
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 - 6.2 The Unit Circle and Circular Functions - 6.2 Exercises - Page 589: 65
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