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

Multiple Choice

Use the sum-to-product formulas to write the given expression as a product. ​​ $$\sin 5 \theta - \sin 3 \theta$$ ​

A) ​​2 sin 4θ cos θ
B) ​-2 sin 4θ sin θ
C) -​2 cos 4θ cos θ
D) ​2 cos 4θ sin θ
E) ​​2 cos 4θ cos θ