If a double ordinate of the parabola \[{{y}^{2}}=4ax\] be of length \[8a\], then the angle between the lines joining the vertex of the parabola to the ends of this double ordinate is

If a double ordinate of the parabola \[{{y}^{2}}=4ax\] be of length \[

1.	If a double ordinate of the parabola \[{{y}^{2}}=4ax\] be of length \[8a\], then the angle between the lines joining the vertex of the parabola to the ends of this double ordinate is
A.	30o
B.	60o
C.	90o
D.	120o
Answer» D. 120o

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If a double ordinate of the parabola \[{{y}^{2}}=4ax\] be of length \[8a\], then the angle between the lines joining the vertex of the parabola to the ends of this double ordinate is

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