New plane and spherical trigonometry, surveying, and navigation (1903)
Wentworth, G. A. (George Albert), 1835-1906 · Boston : Ginn & Company · leaf 286
os 18°.log cos 18° = 9.97821colog cos 9° = 0.00538log sin i A = 9.98359$A= 74° 21.A = 148° 42. 2. Through the foot of a rodwhich makes the angle A with aplane a straight line is drawn inthe plane. This line makes the 180° angle B with the projection of therod upon the plane. What angledoes this… … It is required to find the angleCOI = x. With a radius equal to unity,from O as a centre, construct thespherical triangle DC I.Then i = A, c = B, d = COI = x,and CDI = 90°. By [38], cos d = cos i cos c..-. cos x = cos A cos B. 278 SPHERICAL TRIGONOMETRY. 3. Find the volume V of an oblique…
Trigonometry · Surveying · Navigation
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
