Describe the Graph Using Another Equation $y=\cos \left(x+\frac{\pi}{2}\right)-\cos \left(x-\frac{\pi}{2}\right)$ A) $- 2 \sin x$

Multiple Choice

Describe the graph using another equation.
- $y=\cos \left(x+\frac{\pi}{2}\right) -\cos \left(x-\frac{\pi}{2}\right)$

A) $- 2 \sin x$
B) $- 2 \cos x$
C) $- \sin x$
D) $- \cos x$