If sinx + siny + sinz=0 then find cos x+cosy+cosz=?
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If sinx+siny+sinz=0, x=y=z=0°
*cosx+cosy+cosz
=cos0°+cos0°+cos0°
=1+1+1
=3
*cosx+cosy+cosz
=cos0°+cos0°+cos0°
=1+1+1
=3
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