Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 15
og a = 1.89209 I cot 4 = 9.72262 - 10 colog sin A = 0.05340 log ft = 1.61471 logc = 1.94549 ft = 41.182 c = 88.204 26 PLANE TRIGONOMETRY Case III A B Given A = 50° 2, 6 = 88; find B, a, c1. B = 90° -A= 39° 58. V a 2. ~ = tan A ; .. a = b tan .4. /^oV G 3. - = cos ^4. c 6=88Fig. 17 .. b = c cos .4,… … Case IY Given c = 58.40, a = 47.55; find A, B, b.1. sin A 2. £ = 90°-A 3. - = cot A ; .. b = a cot yl. log sin ^4 = log a + colog c log a = 1.67715 colog e = 8.23359 - 10 log sin A = 9.91074-10 A = 54° 31 B = 35° 29 log b = log a + log cot Alog a = 1.67715log cot A = 9.85300 - 10log b = 1.53015b =…
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