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 164
xóo GEOMETRIZ TRIANGVLORVM | (WA cocopeo fimt eirculi quadrantes. Denmnp. -toigitur communi med G P, … anguli A B C. zm oflenditur. Primo , angulis E Y G. equalis efl Itteri A B..— Nam A ef polus femn- circu NFY, 6 B eid polus femcirculi HF K. lagu BK C AI fint circuli quadrantes. — Quare ablato. communi medio BI, vefidui avcus BK € AI fmm equales. — Atqui. AK. men[arat pe 9 bujus angulum IFK ,…
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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