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If A,B,C, are the angles of a triangle s...

If A,B,C, are the angles of a triangle such that `cot(A/2)=3tan(C/2),` then `sinA ,sinB ,sinC` are in (a)`AdotPdot` (b) `GdotPdot` (c) `HdotPdot` (d) none of these

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