If 2 cos A - sinA = x and cosA - 3 sinA = y , prove that : 2x 2 + y 2 - 2xy = 5
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चल हट मर रयणणणणणणणणणणणण bsbsjshsbdb. Mr ja Mr ja Mr ja Mr ja Mr ja Mr ja Mr ja Mr ja medhdidbjs shdvshsb disbdvr jdbrv sjbe rsibe r
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for solution see in the picture..
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