Analytic geometry, for technical schools and colleges (1897)
Lambert, Preston Albert, 1862-1925 · New York, Macmillan · leaf 145
he area of the circumscribedparallelogram equals the area of the rectangle on the axes. Art. 68. — Eccentric Angle of the Hyperbola On the transverse axis of the hyperbola describe a circle.Through the foot of the ordinate of any point (x, y) of thehyperbola draw a tangent to thiscircle; the angle… … Let Al\ and AP-. be a pair of conjugate diameters of the IllOlEliTlES OF THE CONIC SECTIONS 131 hyperlxtla 1; (.i\,i/i) the coordinates, c/), the eeeeutric angle of the point I\ ; 6 and0 the angles included by theconjugate diameters and theaxes of the hyperbola. Then b tan <^, tan .Tj ((sec…
Geometry, Analytic
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