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If tanA and tanB are the roots of x^2+px+q=0 prove that sin^2(A+B)+p sin(A+B)cos(A+B)+q cos^2(A+B)=q?

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  • If tanA and tanB are the roots of x^2+px+q=0 prove that sin^2(A+B)+p sin(A+B)cos(A+B)+q cos^2(A+B)=q?


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