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 153
DEREN EIIBS) 149 ribus & angulo uni eorum oppofito;infuper nota fpecie angu- | lialteri dato lateri oppofiti;anguli reiiqui latufque tertium in- veniuntur. Demiffüs enim ab angulo datis lateribus conten- to,in oppofitum latus (continuatum fi oportet) perpendicu- laris arcus, obliquangulum… … | ivtra Triangulum. cadit , prepter utrumque angulum ad B. C9 C acutum ; fiuntque vettangula Tiiangula duo , A DC €& AD B, datrquein Triangulo ADC ba4ís AC part. 5o, G an- gulusad CQ part. 30. taque per primum pori[ma duodecima bujus ,. A De efl part. 22, 3x xy : quadrante circuli mnuns , pev 9…
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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