Force Vector a Has a Length of 5 N and an Angle

Multiple Choice

Force vector A has a length of 5 N and an angle of 30 ^$\circ$ with respect to the positive x-axis.Force vector B has a length of 5 N and an angle of 150 ^$\circ$ with respect to the positive x-axis.What is the direction of a third force vector which must be added to A and B in order to make the net force equal to zero? (All three forces act on the same object) .

A) 0^o
B) 90^o
C) 180^o
D) 270^o
E) None of the above are correct.