Question

If |A| = 2 and |B |= 4 , then match the relations in column I with the angle θ between A and B in column II.

Column I	Column II
(a) A.B = 0	(i) θ = 0
(b) A.B = +8	(ii) θ = 90°
(c) A.B = 4	(iii) θ = 180°
(d) A.B = –8	(iv) θ = 60°

Answer 1

(a) matches with (ii)

(b) matches with (i)

(c) matches with (iv)

(d) matches with (iii)