New plane and spherical trigonometry, surveying, and navigation (1903)
Wentworth, G. A. (George Albert), 1835-1906 · Boston : Ginn & Company · leaf 130
is16 2, and the suns distance is92,400,000 miles. Find the sunsdiameter in miles. Let A represent the centre of theearth, B that of the sun, and C apoint on the edge of the suns disk.Then in the right triangle ABC, given A = 16 2, c = 92,400,000miles; required 2 a. a = c sin A. logc = 7.96567 log… … Let O be the centre of the earth,NS the axis, NAS the meridian ofCambridge, A the position of Cam-bridge, and C the centre of itsparallel of latitude. Then, in theright triangle OAC, given O = 90°- 42° 227 49 = 47° 37r 11, OA =3956.2 miles; required AC. AC = AOsin O.log AO = 3.59728log sin O =…
Trigonometry · Surveying · Navigation
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