Express the Product as a Sum or Difference $\sin 7 x \cos 4 x$

question 223

Multiple Choice

Express the product as a sum or difference.
- $\sin 7 x \cos 4 x$

• A) \(\frac { 1 } { 2 } ( \sin 11 x + \sin 3 x )\)
• B) \(\sin \left( \cos 28 x ^ { 2 } \right)\)
• C) \(\frac { 1 } { 2 } ( \cos 11 x - \cos 3 x )\)
• D) \(\frac { 1 } { 2 } ( \sin 11 x + \cos 3 x )\)

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