Trigonometry (10th Edition)

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

Chapter 5 - Trigonometric Identities - Section 5.6 Half-Angle Identities - 5.6 Exercises - Page 239: 84

Answer

$sin~162^{\circ} = \frac{\sqrt{5}-1}{4}$

Work Step by Step

$sin~x = sin(180^{\circ}-x)$ We can find the value of $sin~162^{\circ}$: $sin~162^{\circ} = sin(180^{\circ}-162^{\circ})$ $sin~162^{\circ} = sin(18^{\circ})$ $sin~162^{\circ} = \frac{\sqrt{5}-1}{4}$
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