Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 118
two parts immediately adjacent are calledadjacent parts, and the other two are called opposite parts. THE RIGHT SPHERICAL TRIANGLE. 109 Rule I. The sine of the middle part is equal to the productof the tangents of the adjacent parts. Rule II. The sine of the middle part is equal to the productof… … co.B part, and comparing theresulting equations with theequations contained in For-mulas [37]-[42]. For example, let co. c betaken as middle part, thenco. A and co. B are the ad-jacent parts, and a and bthe opposite parts,—as isvery plainly seen in Fig. 39,in which the order of theparts is shown by…
Trigonometry · Surveying · Navigation
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
