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 464
ACTICAL APPLICATIONS. Ill Ex. 2. A ship starts from Valparaiso, Chili, Lat.33° 02 S., Lon. 71°43 W., and sails on the arc of a great, circle in a northwesterly direc-tion 3840 miles, when her longitude is found to be 120° W. Whatis her latitude ? Ajis. 52 48 S. Ex. 3. A ship starts from Eio… … JProb, 2.—To find the time of day frcmi the altitude of the sun, Sugs.—Let NESQ represent the projection of the concave of the heavensupon the plane of the meridian of observation.The equator of this concave sphere is simply theintersection of the plane of the earths equator withthis imaginary…
Geometry · Trigonometry
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