if tanA and tanB are the roots of x^2+px+q=0, show that the value of sin^2(A+B)+p.sin(A+B).cos(A+B)+q.cos^2(A+B) =q.
if tanA and tanB are the roots of x^2+px+q=0, show that the value of sin^2(A+B)+p.sin(A+B).cos(A+B)+q.cos^2(A+B) =q.
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