Answer
$\sin{(2u)}=2\sin{(u)}\cos{(u)}.$
Work Step by Step
By the identity: $\sin{(2u)}=2\sin{(u)}\cos{(u)}.$
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 10 - Analytic Geometry - 10.5 Rotation of Axes; General Form of a Conic - 10.5 Assess Your Understanding - Page 678: 2
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