# Aptitude Question ID : 92994

If $\cos x+\cos y = 2,$ the value of $\sin x+\sin y$ is :
[A]-1
[B]1
[C]0
[D]2

0
$\cos x+\cos y = 2$
$\because \cos x\leq 1$
$=> \cos x = 1; \cos y = 1$
$=> x = y = 0\textdegree [\cos0\textdegree = 1]$
$\therefore \sin x + \sin y = 0$
Hence option [C] is the right answer.