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If tanA,tanB\tan A, \tan BtanA,tanB are roots of x2−Px+Q=0x^{2} - Px + Q = 0x2−Px+Q=0 the value of sin2(A+B)\sin^{2}(A+B) sin2(A+B) is?
Note: P,QP,QP,Q are real numbers.
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