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Question

Family of lines represented by the equation (costheta + sintheta)x + (costheta - sintheta)y - 3(3costheta + sintheta) =0 passes through a fixed point M for all real values of theta. The reflection of M in the line x-y=0 is
A)6,3
B)3,6
C)-6,3
D)3,-6

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