New plane and spherical trigonometry, surveying, and navigation (1903)
Wentworth, G. A. (George Albert), 1835-1906 · Boston : Ginn & Company · leaf 289
ossing the equator,90° — B = course at equator,AB = d = distance sailed. By Napiers Rules and sin I — tan m cot a,cos B = cos Z sin a,cos a = tan Z cot d. Whence, tan m = sin Z tan a, cos B == cos Z sin a, and cot d = cot Z cos a. 6. Two places have the same latitude Z, and the distance between… … Let B and C be the two given places of latitude Z, d the arc of thegreat circle passing through B and (7, and k the arc BC of the parallel oflatitude of B and C. By Prob. 1, Ex. XXXV, sin i A = sin \ d esc (90° - I) = sin \ d sec I..-. -J- A = shr-1 (sin \ d sec I).A = 2 sin-1 (sin i d sec I).A =…
Trigonometry · Surveying · Navigation
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