Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 7 - Trigonometric Identities and Equations - 7.6 Trigonometric Equations - 7.6 Exercises: 13

Answer

$-30^{o}\not\in[0^{o},360)$

Work Step by Step

Solving the equation over the given interval we expect the solution(s) to belong to the interval. $-30^{o}\not\in[0^{o},360)$, so it can not be considered as a solution.
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