Trigonometry (10th Edition)

Published by Pearson
ISBN 10: 0321671775
ISBN 13: 978-0-32167-177-6

Chapter 2 - Test - Page 92: 12a

Answer

$0.97939940$

Work Step by Step

Step 1: $78^{\circ}21'=78\frac{21}{60}^{\circ}=78.35^{\circ}$ Step 2: $\sin78^{\circ}21'=\sin78.35^{\circ}\approx0.97939940$
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