Math Chapter Wise The Line And General Equation Of Second Degree And Its Classification English MCQ UP PCS (Pre) 2006 Q.For the curve x=t2 –1, y=t2 –t, the tangent is perpendicular to X-axis, where: At= 0 B1 t 2 = Ct=∞ DNone of the above Show answer Correct answer: t= 0