Analytic geometry, for technical schools and colleges (1897)
Lambert, Preston Albert, 1862-1925 · New York, Macmillan · leaf 143
et the circumscribed circleand draw the radius of this circle to the point of meeting. The angle <^ made by thisradius with the transverseaxis of the ellipse is calledthe eccentric angle of thepoint (.r, ?/). Erom the figurex—.a • cos <)!>, y = -. 1\D=^ - ■ asinc^(( a = h • sin <^.The… … ellipse I+ |: Avith the axis of the ellipse. Then tan 6 tan 6 IllOPKUTIES OF THE CONIC SECTIONS 129 (.Il, ?/i) be the coordinates, ^i the eccentric angle of J\; {.i:,,y.,)tlie coordinates, <f>.2 the eccentric angle of F2. Then tan e _?/, _ h sin •il a cos ^1 tai X., _ 6 sin <^o <<-…
Geometry, Analytic
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