A treatise on special or elementary geometry (1877)
Olney, Edward, 1827-1887, Olney, Edward, 1827-1887. Elements of trigonometry, plane and spherical · New York : Sheldon · leaf 457
in(C = 50° 30 08.6) = 9.8874210 Rejectmg 10 = 9.8853290= log sm B. .-. B = 50° 10 10. 3. Given a = 50° 45 20, b = 69° 12 40, and A = 44° 22 10,to solve the triangle. 1st. To find B. sin a ; sin 5 ;; sin A : sin B. ar. CO. log sin {a = 50° 45 20) = 0.1110044 + log sin {b = 69° 12 40) = 9.9707626 +… … * The determination of the species of B, or what isthe same thing, the number of solutions, can usually beeffected by a simple inspection without any computa-tion whatever. Thus, sin j9 = sin 5 sin A. the loga-rithms of which are given above, as ie log sin a. Now,as both a and p are < 90°, and…
Geometry · Trigonometry
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-193-112.webp)
