Analytic geometry for colleges, universities, and technical schools (1892)
Nichols, E. W. (Edward West), 1858- · Boston [Mass.] : Leach, Shewell & Sanborn · leaf 161
these equations, we see that the only differenceis in the sign of b^. If, therefore, in the various analyticalexpressions we have deduced for the ellipse, we substitute— b^ for b^, or, what is the same thing, + & V— 1 for b, wewill obtain the corresponding analytical expressions for… … Thus in Fig. 49, if AA be the transverse axis of the hyper-bola which has BB for its conjugate axis, then the hyperbolawhich has BB for its transverse axis and AA for its conjugate THE HYPERBOLA. 147 axis is its conjugate; and, conversely, the hyperbola whosetransverse axis is BB and conjugate axis…
Geometry, Analytic
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