Range of angle made by focal chord of a parabola at the vertex.

Asked Dec 11 '16 at 12:22

Active Dec 11 '16 at 12:22

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How to determine the range of angle which a focal chord of a parabola (considering a standard parabola $ y^2 =4ax $) subtend at the vertex.

My attempt:Take $ t_1$ and $ t_2$ two points on the para bola. We have the relation $ t_1 t_2 =-1$. How to move further?

asked Dec 11 '16 at 12:22

Pratyush

Rather you mean the points $(at^2,2at)$ for parameters $t_1$ and $t_2$. – StubbornAtom Dec 11 '16 at 12:26
Exactly I mean by that points only. – Pratyush Dec 11 '16 at 13:26

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