Use the Product-To-Sum Formulas to Write the Expression Below as a Sum

question 66

Multiple Choice

Use the product-to-sum formulas to write the expression below as a sum or difference.
$\sin ( 8 \theta ) \cos ( 6 \theta )$

• A) \(\frac { 1 } { 2 } ( \cos ( 2 \theta ) + \cos ( 14 \theta ) )\)
• B) \(\frac { 1 } { 2 } ( \sin ( 2 \theta ) + \cos ( 14 \theta ) )\)
• C) \(\frac { 1 } { 2 } ( \sin ( 14 \theta ) + \sin ( 2 \theta ) )\)
• D) \(\frac { 1 } { 2 } ( \cos ( 2 \theta ) - \cos ( 14 \theta ) )\)
• E) \(\frac { 1 } { 2 } ( \sin ( 14 \theta ) - \sin ( 2 \theta ) )\)

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