Express the Sum or Difference as a Product of Sines $\sin ( 7 \theta ) + \sin ( 3 \theta )$

question 168

Multiple Choice

Express the sum or difference as a product of sines and/or cosines.
- $\sin ( 7 \theta ) + \sin ( 3 \theta )$

• A) \(2 \sin ( 5 \theta ) \sin ( 2 \theta )\)
• B) \(2 \cos ( 5 \theta ) \sin ( 2 \theta )\)
• C) \(2 \sin ( 10 \theta )\)
• D) \(2 \sin ( 5 \theta ) \cos ( 2 \theta )\)

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