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 504: 25


$(2x)^\circ=30^\circ$ $(4x)^\circ=60^\circ$

Work Step by Step

The sum of the two angles is a right angle ($90^\circ$): $(2x)^\circ+(4x)^\circ=(7x)^\circ=90^\circ$ $6x=90$ $x=15$ $(2x)^\circ=30^\circ$ $(4x)^\circ=60^\circ$
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