?Show that the tangent lines to the parabola $x^{2}=4 \mathrm{py}$ drawn from any

Chapter 9, Problem 59

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Show that the tangent lines to the parabola $x^{2}=4 \mathrm{py}$ drawn from any point on the directrix are perpendicular.

Equation transcription:

${x}^{2}=4py$

Text transcription:

x^2=4py

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?Show that the tangent lines to the parabola \(x^{2}=4 \mathrm{py}\) drawn from any