New plane and spherical trigonometry, surveying, and navigation (1903)
Wentworth, G. A. (George Albert), 1835-1906 · Boston : Ginn & Company · leaf 149
2.69897 log sin 64° 51= 9.95674 colog sin 57° 33 40 = 0.07368 log AC = 2.72939 AC = 536.28. Distances of C from ^4 and B, 536.28 feet; 500.16 feet. 58. Two inaccessible points Aand B are visible from D, but noother point can be found whenceboth are visible. Take some pointC whence A and D can be… … AD= CD sin A CDsin CAD = 200Sin50°8(r.sin 40° 30 log 200 = 2.30103 log sin 50° 30 = 9.88741 colog sin 40° 30 = 0.18746 log AD = 2.37590 AD = 237.63.= 200 sin DBE sin 88° 30 sin 37° log 200 = 2.30103 log sin 88° 30= 9.99985 colog sin 37° = 0.22054 log BD = 2.52142 BD = 332.22.tan i (DAB - DBA)BD-AD.…
Trigonometry · Surveying · Navigation
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