Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 155
], p. 159,without previously computing A and B. But the Formulas[45] are not adapted to logarithmic work. Instead of chang-ing them to forms suitable for logarithms, we may use the following method, which leads tothe same results and has the ad-vantage that, in applying it, noth-ing has to be… … THE OBLIQUE SPHERICAL TRIANGLE 167 By Rule II, cos a = cos m cos p ; whence, cos p = cos a sec m. cos c = cos n cos p ; whence, cos p = cos c sec w. Therefore, cos c sec w = cos a sec w. Since n = b — m, cos c = cos a sec m cos (& — m). Now c may be computed from the two equations tan m = tan a…
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