Express as a Product $\sin 13 \theta + \sin 3 \theta$

question 11

Multiple Choice

Express as a product. $\sin 13 \theta + \sin 3 \theta$

• A) \(\sin ( 8 \theta ) \cos ( 5 \theta )\)
• B) \(2 \sin ( 16 \theta ) \cos ( 10 \theta )\)
• C) \(2 \cos ( 9 \theta ) \sin ( 4 \theta )\)
• D) \(4 \sin ( 8 \theta ) \cos ( 5 \theta )\)
• E) \(2 \sin ( 8 \theta ) \cos ( 5 \theta )\)

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