If Ā= B + C, and the magnitude of A, B and are 5, 4 and 3 units respectively, the angle
between A and C is
(A) cos(3/5)
(B) cos'(4/5)
(C) 7/2
(D) sin(3/4)

If Ā= B + C, and the magnitude of A, B and are 5, 4 and 3 units respectively, the angle
between A and C is
(A) cos(3/5)
(B) cos'(4/5)
(C) 7/2
(D) sin(3/4)