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Let vector(α, β, γ) be three unit vectors such that vector(α.β) = vector(α .γ)

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Let vector(α, β, γ) be three unit vectors such that vector(α.β) = vector(α .γ)  and the angle between vector β and vector γ is 30°. Then vector α is 

(A) 2vector(α x γ)

(B) - 2vector(β x γ) 

(C) ±2vector(β x γ) 

(D) vector(β x γ)

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Best answer

The correct option (C) ±2vector(β x γ)    

Explanation:

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