New plane and spherical trigonometry, surveying, and navigation (1903)
Wentworth, G. A. (George Albert), 1835-1906 · Boston : Ginn & Company · leaf 292
possible only for places within theArctic or Antarctic circles. For suchplaces at certain seasons dependingon d the sun fails to rise during 24hours. 13. Given the latitude of a placeand the suns declination ; find hisaltitude and azimuth at 6 oclocka.m. (neglecting refraction). Com-pute the… … By [38], cos MZ — cos PZ cos MP.cos (90°- h) = cos (90° -I) cos (90° -d). 284 SPHERICAL TRIGONOMETRY. .-. sin h = sin I sin d.By [42], sin PZ = tan PM cot PZM.sin (90° - I) = tan (90° - d) cot a.cos Z = cot d cot a..-. cot a = cos Hand.If Z = 48° 9 and d = 23° 27,log sin I =9.87209log sin d =…
Trigonometry · Surveying · Navigation
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