Philippi Lansbergii Triangvlorvm geometriae libri qvatvor : in quibus novâ & perspicuâ methodo, & apodeixei [romanized], tota ipsorum triangulorum doctrina explicatur .. (1631)
Lansberge, Philippe van, 1561-1632 · Amsterdami : Apud Gvilielmvm Blaevw · leaf 155
. C relinquitur latus AB part. yo. Que fuerunt inmvefliganda. Secundo,datis duobus angulis, & latere uni eorum oppofi- to,patefcunt reliqua latera,& angulus tertius,fi modo confti- teritutrum latus ignotum dato angulo oppofitum, quadrante majus fueritan minus. Perpendicularis enim arcus eductus à… … ad. A. ' Primum enim in Triangulo vetlangulo A D C daturtofis A C. part. go, cum ang.ad C partium 3o. Ergo per primum pori[ma x2. bujus perpends- cularis AD eflpart. 22, 3x. X3. : caditque intra Triangulum, quia B C9 C anguli dati funt acutz. | Secundo , in Triangulo reHlangulo A DB datum latus.…
Trigonometry -- Early works to 1800
Internet Archive · Fisher - University of Toronto · Public domain (published before 1931). Free to use for anything.
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