Trigonometry (10th Edition)

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

Chapter 2 - Acute Angles and Right Triangles - Section 2.3 Finding Trigonometric Function Values Using a Calculator - 2.3 Exercises: 54

Answer

False

Work Step by Step

$\frac{1}{2} \sin 40^{\circ} = \sin [\frac{1}{2}\times 40^{\circ}]$ $ \frac{1}{2} \sin (40^{\circ})= 0.3213938048 $ $\sin (20^{\circ}) = 0.3420201433$ $0.3213938048\ne 0.3420201433$
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