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The equation represent a pair of coincident lines through the origin if
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Correct option is D
Lines are coincident if (h)2=a⋅aTalk to our academic expert!
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If the lines represented by the equation are rotated about the point through an angle of one in clockwise direction and the other in anticlockwise direction, so that they become perpendicular, then the equation of the pair of lines in the new position is
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