A treatise on special or elementary geometry (1877)
Olney, Edward, 1827-1887, Olney, Edward, 1827-1887. Elements of trigonometry, plane and spherical · New York : Sheldon · leaf 436
. ^. Havingsm C ^ 32° 08 56, take CA = b, and draw AB through Fig. 53. P. 6. Given B = 100°, and b = 112°, to project the triangle and com-pute the other parts. Projection.—See Fig. 54. Numerical Solution.—r<? find c, we have sin c = tan 6 cot B = tan 112° cot 100\ Computing by logarithms, log… … Fig. 54. To find a, we have sin & = sin a sin B; whence sin a = sin b sin 112 sin B sm lUO Computing by logarithms, log sin 112° = 9.967166- log sin 100° = 9.993351 Adding 10 = 9.973815 = log sin a. .-. <i = 70°1810.7,or 1094149.3,t. e., BC, or EC. To find C, we have cos B = cos 5 sin C ;…
Geometry · Trigonometry
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