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![conic sections - A tangent to ellipse $E_1$ intersects ellipse $E_2$ at $P$ and $Q$. Prove that the tangents to $E_2$ at $P$ and $Q$ are perpendicular to each other. - Mathematics conic sections - A tangent to ellipse $E_1$ intersects ellipse $E_2$ at $P$ and $Q$. Prove that the tangents to $E_2$ at $P$ and $Q$ are perpendicular to each other. - Mathematics](https://i.imgur.com/DHOGxI1.png)
conic sections - A tangent to ellipse $E_1$ intersects ellipse $E_2$ at $P$ and $Q$. Prove that the tangents to $E_2$ at $P$ and $Q$ are perpendicular to each other. - Mathematics
![An elementary course of infinitesimal calculus . = 2a (6), we find cos^ = cos^ (7), or, the focal distances make equal angles with the curve onopposite sides. Ex. 2. To find An elementary course of infinitesimal calculus . = 2a (6), we find cos^ = cos^ (7), or, the focal distances make equal angles with the curve onopposite sides. Ex. 2. To find](https://c8.alamy.com/comp/2AXJT0H/an-elementary-course-of-infinitesimal-calculus-=-2a-6-we-find-cos-=-cos-7-or-the-focal-distances-make-equal-angles-with-the-curve-onopposite-sides-ex-2-to-find-the-form-which-a-reflecting-or-refractingsurface-must-have-in-order-that-incident-rays-whose-directionspass-through-a-fixed-point-s-may-be-reflected-or-refracted-indirections-passing-through-a-fixed-point-is-the-case-of-reflection-is-merely-the-converse-of-ex-1-thesurface-must-have-the-form-generated-by-the-revolution-of-anellipse-or-hyperbola-about-the-line-joining-the-foci-s-s-252-388-infinitesimal-calculus-oh-2AXJT0H.jpg)
An elementary course of infinitesimal calculus . = 2a (6), we find cos^ = cos^ (7), or, the focal distances make equal angles with the curve onopposite sides. Ex. 2. To find
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