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 465
Therefore i the hour angle NNS = 30 2Z 03 .3, and the hour angle is 60°44 07. This reduced to time at 4 minutes to a degree, gives 4 h. 2 m. 56 s. be-fore noon, or 7 h. 57 m. 4 s. a. m. Ex. 2. In latitude 40° 21 X., when the declination of the sun is3° 20 S., and its altitude 36° 12, what is the… … JProb. S,—To fijul the time of sunrising and sunsetting at anygiven place on a given day. Sugs.—The projection being the same as before, let MRSM represent the ap-parent diurnal path of the sun. Since SM is described in 6 hours, the time taken to describe RS is the time before 6 oclock, atwhich the…
Geometry · Trigonometry
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