New plane and spherical trigonometry, surveying, and navigation (1903)
Wentworth, G. A. (George Albert), 1835-1906 · Boston : Ginn & Company · leaf 68
ce \ c = T\ of p, logjc = 0.84150. s>h\ZAOE = ^- r log r = log | r ■+- colog sin 36°.log|c = 0.84150colog sin 36° = 0.23078logr = 1.07237 £AOC= = i«;: 21482 sin ZyiOC = ^ - r. logr = 1.07- log sin A OC = jU4gg4 - 10 log > r = 0.52221 tan AOi h + colog tan jo/log > *■ - 0.62221cole >C =… … A Y- B Perimeter = 2<». AB= | x 20= !ZOAB = lof 180° = 30°. r log^4i? = 0.52288log tan 30° = 0.76144 - 10logr = 0.28432 tan 30° : 60 PLANE TRIGONOMETRY. Area = izr2. log it = 0.49715 logr2 = 0.56864 log area = 1.06579 Area = 11.636. 17. Find the area of a regularpolygon of 15 sides inscribed in…
Trigonometry · Surveying · Navigation
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