If the angle between two vectors $A$ and $B$ is $120^{\circ}$, its resultant $C$ will be
$C=|A-B|$
$C < |A-B|$
$C > |A-B|$
$C=|A+B|$
The vector sum of two forces is perpendicular to their vector differences. In that case, the force
Given $A =\hat{ i }+\hat{ j }+\hat{ k }$ and $B =-\hat{ i }-\hat{ j }-\hat{ k }$, then $( A - B )$ will make angle with $A$