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Tangent is drawn at any point (x1, y1) o...

Tangent is drawn at any point `(x_1, y_1)` other than the vertex on the parabola `y^2=4a x` . If tangents are drawn from any point on this tangent to the circle `x^2+y^2=a^2` such that all the chords of contact pass through a fixed point `(x_2,y_2),` then

A

(a) `x_1,a_,x_2` are in GP

B

(b) `y_1/2,a,y_2` are in GP

C

(c)`-4,y_1/y_2,x_1/x_2` are in GP

D

(d) `x_1x_2+y_1y_2=a^2`

Text Solution

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The correct Answer is:
B, C, D
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