Two perpendicular striaght lines through the focus of the parabola y2=4ax meets its directrix in T1 and T2 respectively. Show that the tangent the tangent to the parabola parallel to the perpendicular lines intersect in the midpoint of T1T2.
Two perpendicular striaght lines through the focus of the parabola y2=4ax meets its directrix in T1 and T2 respectively. Show that the tangent the tangent to the parabola parallel to the perpendicular lines intersect in the midpoint of T1T2.