5. If sin x+sin y+sinz-3, then cos x + cos y + cos z- – InterviewSolution

1.	5. If sin x+sin y+sinz-3, then cos x + cos y + cos z-
Answer» sinx+siny+sinz=3.....(given)it is possible only if sinx=siny=sinz=1then we know that,cos^2x=1-sin^2xand sinx=1hence cosx=0.....(1)similarly cosy=cosz=0hence cosx+cosy+cosz=0

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