$\cos(\alpha + \beta)$ ifadesinin eşiti aşağıdakilerden hangisidir?
A) $\cos(\alpha)\cos(\beta) - \sin(\alpha)\sin(\beta)$
B) $\cos(\alpha)\cos(\beta) + \sin(\alpha)\sin(\beta)$
C) $\sin(\alpha)\cos(\beta) + \cos(\alpha)\sin(\beta)$
D) $\sin(\alpha)\cos(\beta) - \cos(\alpha)\sin(\beta)$
E) $\sin(\alpha + \beta)$
