If \( \tan A, \tan B \) are the roots of the quadratic equation \( a b x^{2} \) \( -c^{2} x+a b=...
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0If \( \tan A, \tan B \) are the roots of the quadratic equation \( a b x^{2} \) \( -c^{2} x+a b=0 \) where \( a, b, c \) are sides of the \( \triangle A B C \) then \( \sin ^{2} A+\sin ^{2} B+\sin ^{2} C \) is
(A) 1
(B) 2
(C) 3
(D) \( 3 / 2 \)
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