Use the Sum-To-Product Formulas to Select the Sum or Difference $$\sin 7 \theta + \sin 5 \theta$$

Multiple Choice

Use the sum-to-product formulas to select the sum or difference as a product. $$\sin 7 \theta + \sin 5 \theta$$

A) $2 \cos 6 \theta \cos \theta$
B) $2 \sin 7 \theta \cos 5 \theta$
C) $2 \sin 6 \theta \sin \theta$
D) $2 \cos 6 \theta \sin \theta$
E) $2 \sin 6 \theta \cos \theta$