Express the Sum or Difference as a Product of Sines $$\sin \frac { 7 \theta } { 2 } + \sin \frac { 3 \theta } { 2 }$$

question 16

Multiple Choice

Express the sum or difference as a product of sines and/or cosines.
- $$\sin \frac { 7 \theta } { 2 } + \sin \frac { 3 \theta } { 2 }$$

• A) \(2 \sin \frac { 5 \theta } { 2 } \sin \theta\)
• B) \(2 \sin ( 5 \theta )\)
• C) \(2 \cos ( 5 \theta ) \sin \theta\)
• D) \(2 \sin \frac { 5 \theta } { 2 } \cos \theta\)

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