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[" The co-ordinates of a point "P" referred to a rectangular co-ordinate system where "0" is the origin are "],[(1,-2)" .The axes are rotated about "0" through an angle "theta" .If the co-ordinates of "P" in the new system are "],[(k-1,k+1)" ,then "k^(2)" is equal to "],[[" (1) "(4)/(5)," (2) "(2)/(3)," (2) "(2)/(3)]]

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