Question

The figure shows a typical point P(x0, y0) on the parabola
y2 = 4px. The line L is tangent to the parabola at P.
The parabola’s focus lies at F(p, 0). Let α,β and φ be the

Answer 1

see image for diagram

Answer 2

The figure shows a typical point P(x0, y0) on the parabola
y2 = 4px. The line L is tangent to the parabola at P.
The parabola’s focus lies at F(p, 0). Let α,β and φ be the
angles shown in the figure.

Show that tan β = (2p/y0)
.