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Let A = [ (4 sec^2θ 1 0), (0 3 tan^2θ 1),(0 1 1)],and B = [ (cot^2θ 2 0), (1 3cosce2θ 1), (1 1 4)],

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Let A = [ (4 sec2θ  1 0), (0 3 tan2θ 1),(0 1 1)],and B = [ (cot2θ 2 0), (1 3cosce2θ 1), (1 1 4)],then minimum value of tr(AB) is

(A) 19 

(B) 25 

(C) 29 

(D) 32

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Correct Answer is: (D) 32

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