b) To hear someone or Something without knowledge of speaker.
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When two parallel lines are cut by a transversal, the interior opposite angles on the same side of the transversal are called allied or co-interior angles.
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2) If sets A and B are defined as, A ) = {(x,y)/y = 1/x,0 #x € R} & B = {(x,y)/y = -x,x € R} then a) AnB = A b) An B = B c) An B = 0 d) AU B = A
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