Precalculus (6th Edition)

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

Chapter 5 - Trigonometric Functions - 5.1 Angles - 5.1 Exercises - Page 503: 11


$a)60^{0};$ $b)150^{0}$

Work Step by Step

If two angles are Complement then sum of these angles is $90^0$ If two angles are Supplement then sum of these angles is $180^0$ $a)\alpha+30^0=90^0\Rightarrow \alpha =90^{0}-30^{0}=60^{0};$ $b)\theta+30^0=180^0\Rightarrow \theta=180^{0}-30^{0}=150^{0}$
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