#### Answer

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

#### Work Step by Step

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

Published by
Pearson

ISBN 10:
0321671775

ISBN 13:
978-0-32167-177-6

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

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

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