Aptitude Question ID : 92994

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

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


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