Answer
$\theta = 30 ^{\circ}$
Work Step by Step
1. $x=1.73\approx \sqrt 3$ ; $y=1$
2.$r=\sqrt {(1)^{2}+(\sqrt 3)^{2}} = \sqrt 4 = 2$
3. $\sin\theta = \frac{y}{r}=\frac{1}{2}$
$\sin^{-1} 0.5=30^{\circ}$
$\theta = 30^{\circ}$
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: 76
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