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If vector A and vector B are two non–zero vectors such that vector|A + B| = (vector|A + B|)/2

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If vector A and vector B are two non–zero vectors such that vector|A + B| = (vector|A + B|)/2 and vector|A| = 2 vector|B| then the angle between vector A and vector B is :

(A) 37º 

(B) 53º 

(C) cos–1 (–3/4) 

(D) cos–1 (–4/3) 

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1 Answer

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by (71.7k points)

Correct option  (C) cos–1 (–3/4)

Explanation:

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