Answer
69$^{\circ}$ and 21$^{\circ}$
Work Step by Step
9x + 6 + 3x = 90$^{\circ}$
12x + 6 = 90$^{\circ}$
12x = 84$^{\circ}$
x = 7$^{\circ}$
therefore
9x + 6 = 69$^{\circ}$ and 3x = 21$^{\circ}$
Trigonometry (10th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671775
ISBN 13:
978-0-32167-177-6
Chapter 1 - Trigonometric Functions - Section 1.1 Angles - 1.1 Exercises - Page 7: 21
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