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 424
the arc BB, take BC = the pro-jection of the given adjacent side a. To deter-mine the projection of the opposite side 5, describea circle about P, as a centre, with a radius PC.Through C draw PD, and taking Dd = Dd = bdraw dd\ Tlirough the intersections o, o of dd!with the circumference of the… … 72 SPHERICAL TRIGONOMETRY. a were made upon principles pre\iously established; and it only remains toshow that AC, and AC are projections of b. Since by construction DL is theprojection of an arc equal to b, the projections of arcs of great circles connect-ing D with 0 and o are projections of arc^…
Geometry · Trigonometry
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
