Answer
c. $\frac{4}{5}$
Work Step by Step
We know that
$\sin A = \frac{a}{c} = \frac{16}{20}$ = $\frac{4}{5} $
Trigonometry 7th Edition
by McKeague, Charles P.; Turner, Mark D.
Published by
Cengage Learning
ISBN 10:
1111826854
ISBN 13:
978-1-11182-685-7
Chapter 2 - Section 2.1 - Definition II: Right Triangle Trigonometry - 2.1 Problem Set - Page 63: 79
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