Answer
$\approx 0.38$
Work Step by Step
Using calculator in radian mode gives:
$\sin \left( \dfrac {\pi }{8}\right) =0.382683432\ldots \approx 0.38$
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 6 - Trigonometric Functions - 6.2 Trigonometric Functions: Unit Circle Approach - 6.2 Assess Your Understanding - Page 379: 70
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