If \bo {a} and \bo {b} are two vectors of magnitude 2 , each inclined at an \angle 60^{\circ}, then angle between a and \bo {a}+\bo {b} is

COMEDK Exam 2014 Solved Paper

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If a and b are two vectors of magnitude 2 , each inclined at an ∠60∘, then angle between a and a+b is

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