Plane and solid analytic geometry; an elementary textbook (1905)
Ashton, Charles H. (Charles Hamilton), 1866- · New York, C. Scribner's Sons · leaf 129
e next article that the curve approaches coinci-dence iviih these lines. Such a line is called an asymptote.If we continue to increase ^, we see that there will beno real value of p until tan 0 again becomes numerically hless than — Then p goes througli the same changes in value, decreasing until… … Place the points F and D on the X-axis so thatFO^OF and DC=C1), and draw DH perpendicular Ch. IX, § G6] CONIC SECTIONS 113 to the X-axis. The symmetry of the curve again shows,as in the ellipse, that the hyperbola may be said to havetwo foci, ^and F\ and two directrices, DJI and DH. We can now…
Geometry, Analytic
Internet Archive · Boston Library Consortium · Public Domain Mark 1.0. Free to use for anything.
