Geometry : the elements of Euclid and Legendre simplified and arranged to exclude from geomtrical reasoning the reductio ad absurdum : with the elements of plane and spherical trigonometry, and exercises in elementary geometry and trigonometry / /c By Lawrence S. Benson (1868)
Benson, Lawrence S. (Lawrence Sluter), Legendre, A. M. (Adrien Marie), 1752-1833 · New York : Pub. for the author by Davies & Kent · leaf 213
])aits are also known, and these with the re-quired part constitute the three parts under consideration;therefore these three paias will lie together, or one of tliem SPHERICAL TRIGONOMETRY. 209 ■will be separated from both tlie others. Hence one part isknown as the middle part; and when three… … B the diagram for the middle part, and using the formulae (1)•when the other parts are the ojiposite parts, and we get, 27iesine of the middle part is equal to the product of the cosines ofthe opposite parts. Then, assume again any part for the mid-dle, and use the formulae (2) when the other parts…
Geometry · Trigonometry
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