Bailey, Frederick H. (Frederick Harold), 1865- · Boston, London, Ginn & Co. · leaf 245
connected Avitli this hyperbola is the one the equa-tion of which is where a and b have the same numerical values as in the firstequation. The hyperbolas (1) and (2) are so related thatthe transverse axis of each is the conjugate axis of theother; hence they are included between the same… … Such hyperbolas are said to be conjugate to each other, andin particular (1) is usually called the primary hyperbola and(2) the conjugate hyperbola * The eccentricity of the conjugate hyperbola is its foci lie at the points (0, ± be); and the equations of its ,. . b directrices are y = ± —.e…
Geometry, Analytic
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