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In a DeltaABC, inscribed circle with cen...

In a `DeltaABC`, inscribed circle with centre I touches side AB, AC and BC at D, E, F respectively . Let area of quadrilateral ADIE is 5 units and area of quadrilteral BFID is 10 units. Find the value of `(cos((C)/(2)))/(sin((A-B)/(2)))`.

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