An elementary treatise on coordinate geometry of three dimensions (1912)
Bell, Robert J. T. (Robert John Tainsh), 1877-1963 · London : Macmillan and co., limited · leaf 389
= a& sin a. sin 7 (1) 3, … Pig. 67. Fig. 6S. This equation represents a cylinder which intersects the cone in thegeodesic. If the arcs DjD.t, DoDs. ... are each equal to the circumference ofthe circle in the plane ADC. the positions of OB, when in addition tothe curved sector OAB of the surface of the cone, one, two, ...…
Geometry, Analytic
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