#### Answer

False

#### Work Step by Step

$\frac{1}{2} \sin 40^{\circ} = \sin [\frac{1}{2}\times 40^{\circ}]$
$ \frac{1}{2} \sin (40^{\circ})= 0.3213938048 $
$\sin (20^{\circ}) = 0.3420201433$
$0.3213938048\ne 0.3420201433$

Published by
Pearson

ISBN 10:
0321671775

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

False

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