Analytic geometry for colleges, universities, and technical schools (1892)
Nichols, E. W. (Edward West), 1858- · Boston [Mass.] : Leach, Shewell & Sanborn · leaf 167
ental chords of an hyperbola whose semi-axes bear to each other the ratio - • a CoR. If s ^ t, then / = t; i.e., if one supplementarychord of an hyperbola is parallel to a line drawn through thecentre, then the other supplementary chord is parallel to thetangent drawn to the curve at the point in… … Fig. 50. Let P be auy point at which we wish to draw a tangent-Join P and 0, and from A draw AC || to PO; join C and A.The line PT, drawn from P || to CA will be the requiredtangent. 116. To deduce the equation of the 7iormal to the hyperbola^We can do this by operating on the equation of the…
Geometry, Analytic
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-335-226.webp)
