Answer
A = 60$^{\circ}$
Work Step by Step
$\sin$A = 0.8660254083
A = $\sin$$^{-1}$(0.8660254083)
A = 60.00
Therefore A = 60$^{\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 2 - Acute Angles and Right Triangles - Section 2.1 Trigonometric Functions of Acute Angles - 2.1 Exercises - Page 53: 71
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