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: 47

Answer

False

Work Step by Step

$/sin$ 10$^{\circ}$ + $sin$ 10$^{\circ}$ = $sin$ 20$^{\circ}$ $\sin$ 10$^{\circ}$ $\approx$ 0.173648 Therefore: $\sin$ 10$^{\circ}$ + $\sin$ 10$^{\circ}$ $\approx$ 0.173648 + 0.173648 $\sin$ 10$^{\circ}$ + $\sin$ 10$^{\circ}$ $\approx$ 0.347296 $\sin$ 20$^{\circ}$ $\approx$ 0.342020 Therefore $\sin$ 10$^{\circ}$ + $\sin$ 10$^{\circ}$ $\ne$ $\sin$ 20$^{\circ}$
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