Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 137
Fig. 90 Case I Given the two legs a and b. From Formulas [38] and [42], p. 144, we obtaincos c = cos a cos b,tan A = tan a esc b,tan B = tan b esc a. THE RIGHT SPHERICAL TRIANGLE 149 For a check use cos c = cot A cot B, [43], p. 144. Example. Given a = 27° 28 36, b = 51° 12 8the triangle. log cos a…
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