Math Chapter Wise Conic Section English MCQ TGT 2013 Q.If y + b = m1(x + a) and y + b = m2 (x + a) are two tangents of parabola y2 = 4ax, then- Am1m2 = 1 Bm1m2 = –1 Cm1 + m2 = 0 Dm1 + m2 = –1 Show answer Correct answer: m1m2 = –1