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 159
LIBER IIIL | 15$ ! eur, primit in Triangulo AD € , latos D A part. 6 19 35^ , € in Triangulo CDB, latus DB part. y6 x8 35. -dnfer autem DA ex DB, € relquum erit latus AB part. yo. Adhec in codem triangulo CD B, invenitur angulis tertius ad. B. part... 30, 8 latis B C part. 60. Que fuerunt… … V: finus ang. By ad finu lateris A D, ita finus ang. D, ad finit lat. AB. Item ut [inus ang. C. ad finum lateris A D , ita fimus ang. D , ad finum Lteris A C. VAtquiper x9. Septimi Euclidis , falus à fien. AD. in fum ang... D a- quatur fatto à finn B in [mum AB, C8 fatto à [mu C zn finum A C.…
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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