New plane and spherical trigonometry, surveying, and navigation (1903)
Wentworth, G. A. (George Albert), 1835-1906 · Boston : Ginn & Company · leaf 134
reaches another window21 feet high, on the opposite side ofthe street. Find the width of thestreet. Width of the one part of the street= V402 - 332 =V5ii = 22.605.Width of other part = Vio2 -21* = VTl59 = 34.044.22.605 + 34.044 = 56.649.Total width of the street, 56.64!>feet. 19. The height of a… … Given CC = 30, ACC = 60°,BCC = 30°; required AB. Now CAB = 30°. .: AC = 2 x CC = 60. AC AB AC 60 cos .4 ~ ±V% = 40V3 = 69.282. cos^l ..AB = Height of house, 69.282 feet. 20. A lighthouse 54 feet high issituated on a rock. The angle ofelevation of the top of the light-house, as observed from a ship,…
Trigonometry · Surveying · Navigation
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