Answer
True.
The identity is verified.
Work Step by Step
$4~sin(-x)~cos(-x)=4(-sin~x)~cos~x=-4~sinx~cos~x=-2(2~sinx~cos~x)=-2~sin~2x$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 7 - Review Exercises - Page 553: 83
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