Functions Modeling Change: A Preparation for Calculus, 5th Edition

Published by Wiley
ISBN 10: 1118583191
ISBN 13: 978-1-11858-319-7

Chapter 7 - Trigonometry and Periodic Functions - Review Exercises and Problems for Chapter Seven - Page 318: 72


$\approx0.412$ rad.

Work Step by Step

Take the arcsine of both sides to get $$\arcsin(\sin \theta)=\arcsin(2/5)$$ Therefore, $$\theta=\arcsin(2/5)\approx0.412$$
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