Answer
$2(\cos\frac{(x+y)}{2}\sin\frac{(x-y)}{2})$
Work Step by Step
From what we learned $\sin x-\sin y=2(\cos\frac{(x+y)}{2}\sin\frac{(x-y)}{2})$
Trigonometry 7th Edition
by McKeague, Charles P.; Turner, Mark D.
Published by
Cengage Learning
ISBN 10:
1111826854
ISBN 13:
978-1-11182-685-7
Chapter 5 - Section 5.5 - Additional Identities - 5.5 Problem Set - Page 311: 5
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