Rewrite as a Single Expression $\theta$ )Cos(6 $\theta$ ) - Sin(10 $\theta$ )Sin(6 $\theta$

Multiple Choice

Rewrite as a single expression. cos(10 $\theta$ ) cos(6 $\theta$ ) - sin(10 $\theta$ ) sin(6 $\theta$ )

A) cos(16 $\theta$ )
B) cos(4 $\theta$ )
C) sin(16 $\theta$ )
D) sin(4 $\theta$ )