Question : If A∙ B= AB, then the angle between A and B is
(A) 0°
(B) 45°
(C) 90°
(D) 180°
Answer : option (A)
Solution :
Question : If A∙ B= AB, then the angle between A and B is
(A) 0°
(B) 45°
(C) 90°
(D) 180°
Answer : option (A)
Solution :