What do you mean by polar with respect to parabola?

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It is the secant through the intersection points of two tangents which are coming from the external point.
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The polar p of a point A(x0, y0), exterior to the parabola y2 = 2px, is the secant through the contact points of the tangents drawn from the point A to the parabola.
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Polar with respect to parabola is the point on the parabola where the graph happens to intersect any axes (depends upon the equation of parabola). If it is symmetric about the y-axis then put y=0 and find x. Polar=(x, 0).
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