Question : The vectors a and b are such that |a+ b| = |a − b|. What is the angle between a and b?
(A) 0°
(B) 90°
(C) 60°
(D) 180°
Answer : option (B)
Solution :
The vectors a and b are such that |a+ b| = |a − b|. What is the angle between a and b?
with
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