Plane and solid analytic geometry; an elementary textbook (1901)
Ashton, Charles H. (Charles Hamilton), 1866- · New York, C. Scribner's sons · leaf 164
conjugatediameters which areperpendicular to eachother. If in the ellipse one „ * Fig. 79. diameter, -r1-Kv starts coincident with the major axis and revolves in the posi-tive direction, its conjugate diameter, P2K2, will start … 146 ANALYTIC GEOMETRY [Ch. XI, § 80 coincident with the minor axis and also revolve in thepositive direction, since we have seen that the two mustpass through different quadrants. Let the student show that the angle PxCP2s in whichthe minor axis lies, will always be obtuse. If, in the hyperbola,…
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-192-110.webp)
