A treatise on special or elementary geometry (1877)
Olney, Edward, 1827-1887, Olney, Edward, 1827-1887. Elements of trigonometry, plane and spherical · New York : Sheldon · leaf 420
and B. Conceive this semi-circumfer-ence to revolve on BB, as an axis, till it coincides,first, with.BNB, and then with BNBl The pointG will trace the semi-circumference of a smallcircle perpendicular to the primitive circle, andwhose projection is dd. Hence, making Bd = Bd= a, and drawing dd\ the… … Fig. 27. * Two diakieters of a circle which are at right angles to each other arc called ConjugaUDiameUrs. 68 SPHERICAL TRIGONOMETRY. Queries.—Will a solution of this problem be possible for all values of a aude ? If a had been greater than c in the above case, would the solution havebeen possible…
Geometry · Trigonometry
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