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sinx+siny+sinz = 3cosx+cosy+cosz= ?\Large{\sin x + \sin y + \sin z \ = \ 3 \\ \cos x + \cos y + \cos z = \ ?}sinx+siny+sinz = 3cosx+cosy+cosz= ?
Assume x,y,zx,y,zx,y,z are real numbers.
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