New plane and spherical trigonometry, surveying, and navigation (1903)
Wentworth, G. A. (George Albert), 1835-1906 · Boston : Ginn & Company · leaf 298
c d,I =90° -(m±n). TEACHERS EDITION. 289 log cot (1 : log COS t : log tan m ■ 111 : log cos m : log sin h - log esc d ■• log cos n : n : m — n ■■ 90° -(m-n): .\ I: 10.857739.84411 10.70184: 78° 45 45 9.28976 9.58745: 0.86187: 9.73908; 56° 44 39:22° V 6: 67° 58 54: 67° 58 54 28. Given e = 23° 27 and… … Then VS = v, VB = r, SR = d, RVS = e. Then in the right triangle RVS,by [39], sin SB = sinVS x sinBVS,or sin d = sin v sin e. Also, by [40], cos BVS = tan BV cot VS,or cos e = tan r cot v. .-. tan r = tan v cos e. 29. Given e = 23° 27, the lati-tude of a star 51°, its longitude315°; find its…
Trigonometry · Surveying · Navigation
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