An elementary treatise on analytical geometry : embracing plane co-ordinate geometry, and an introduction to geometry of three dimensions (1869)
Johnson, William Woolsey, 1841-1927 · Philadelphia : J.B. Lippincott · leaf 134
ngents to the parabola and pass through thegiven point (1, 2). Examples.—Give the polar formula for y2 — 4x-\-7y-\-10 = 0. Find the equations of tangents to this curve, passing through(1, — 1) ; through the origin; etc., etc. Prove, from the general formula, the properties of reciprocallypolar and… … 177. Ir a point move in such a manner that the sum of its dis-tances from two fixed points is constant, it will describe a curvecalled an ellipse; the fixed points are called the foci. To find the equation of the ellipse, take for the axis of X thestraight line passing through the foci,F and F, in…
Geometry, Analytic
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
