Choose the one alternative that best completes the statement or answers the question.
Express the product as a sum containing only sines or cosines.
-$\sin ( 3 \theta ) \cos ( 4 \theta )$
A) $\sin \cos \left( 12 \theta ^ { 2 } \right)$
B) $\frac { 1 } { 2 } [ \cos ( 7 \theta ) + \sin \theta ]$
C) $\frac { 1 } { 2 } [ \cos ( 7 \theta ) - \cos \theta ]$
D) $\frac { 1 } { 2 } [ \sin ( 7 \theta ) - \sin \theta ]$

Question

Quizplus · Accepted Answer

The Answer of Choose the one alternative that best completes the statement or answers the question.
Express the product as a sum containing only sines or cosines.
-$\sin ( 3 \theta ) \cos ( 4 \theta )$
A) $\sin \cos \left( 12 \theta ^ { 2 } \right)$
B) $\frac { 1 } { 2 } [ \cos ( 7 \theta ) + \sin \theta ]$
C) $\frac { 1 } { 2 } [ \cos ( 7 \theta ) - \cos \theta ]$
D) $\frac { 1 } { 2 } [ \sin ( 7 \theta ) - \sin \theta ]$

Choose the One Alternative That Best Completes the Statement or Answers