Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Chapter 1 - Section 1.1 - Angles, Degrees, and Special Triangles - 1.1 Problem Set: 17

Answer

a = 60$^{\circ}$

Work Step by Step

A=30$^{\circ}$ 180-D-A = a D= 90 because angles in a straight line add up to 180 90+30=120 180-120=60 a = 60$^{\circ}$
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