Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 170
= 116°1945,^=160°4224, C = 171°2715;find the area. 14. Find the area of a triangle on the earths surface(regarded as spherical) if each side of the triangle is equalto 1°. (Radius of earth = 3958 miles.) CHAPTER IX APPLICATIONS OF SPHERICAL TRIGONOMETRY SECTION LXIV PROBLEM To reduce to the horizon… … p|f^^P-:-gi.gJ B:; -in Fig. 102 COC = n, the angles of inclination of OD and OC, respec-tively, to the horizon. Required the angle DOC = x madeby the projections on the horizon. 181 182 SPHERICAL TRIGONOMETRY The planes of the angles BOD and COC intersect in theline OP, perpendicular to the…
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