Trigonometry (10th Edition)

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

Chapter 2 - Acute Angles and Right Triangles - Section 2.1 Trigonometric Functions of Acute Angles - 2.1 Exercises: 6

Answer

$\cos 45^{\circ}$ = $\frac{\sqrt 2}{2}$

Work Step by Step

Standard angle formula ($\cos 45^{\circ}$ = $\frac{\sqrt 2}{2}$)
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