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SSC Sample Paper SSC CHSL (10+2) Sample Test Paper-6

  • question_answer
    If cos x + cos y = 2 the value of sin x + sin y is

    A)  0                                

    B)  1

    C)  2                    

    D)         -1

    Correct Answer: A

    Solution :

    \[\cos x+\cos y=2\] \[\because \]\[\cos x\le 1\] \[\Rightarrow \]\[\cos x=1:\cos y=1\] \[\Rightarrow \]\[x=y={{0}^{o}}\] \[\therefore \]\[\sin x+\sin y=0\]


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