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If |A x B| = √3 (A.B), the value of 1/2 {|A+B|^2 - |A-B|^2} is

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If |A x B| = √3 (A.B), the value of 1/2 {|A+B|2 - |A-B|2} is

(1) 2AB

(2) 2(A2 + B2)

(3) A2 + B2

(4) AB

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Correct option is (4) AB

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