Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 13
n A. II. The ratio of the adjacent leg to the hypotenuse is calledthe Cosine of A, and written cos-4. III. The ratio of the opposite leg to the adjacent leg iscalled the Tangent of A, and written tan A. IV. The ratio of the adjacent leg to the opposite leg iscalled the Cotangent of A, and written… … In the right triangle ABC(Fig. 2) let a, b, c denote thelengths of the sides opposite tothe acute angles A, B, and theright angle C, respectively, theselengths being all expressed interms of a common unit. Then, cin^_fl_°PPositelegc hypotenuse _ a _ opposite leg tan A sec A cos A adjacent…
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