Tanner, J. H. (John Henry), b. 1861, Allen, Joseph · New York, American Book Co · leaf 279
ough a fixed point in a straight line which is perpendicularto the plane of the ellipse at its center. Every equation of the form jda? + By* — Cz^ = 0 representsa cone. If the two positive coef&cients are equal, it is a coneof revolution, or circular cone. [Cf. Art. 145, equation (7)]. The… … bia. 107. 160. Ruled surfaces. Equation [85], of the un-parted hyper-boloid, may be written iSO-lGl] QUADRIC SURFACES 263 (!-3)(i*:)-(-3M> \o c) a If now the equations — = Jc and (1)(2)(3) be formed, wherein k is any constant, each will represent aplane; and the two planes will intersect in a…
Geometry, Analytic
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
