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In a triangle A B C ,\ (a^2-b^2-c^2)tanA...

In a triangle `A B C ,\ (a^2-b^2-c^2)tanA+(a^2-b^2+c^2)tanB` is equal to(a) `(a^2+b^2-c^2)tanC` (b) `(a^2+b^2+c^2)tanC` `(b^2+c^2-a^2)tanC` (d) none of these

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