Directorivm generale vranometricvm : in quo trigonometriae logarithmicae fvndamenta, ac regulae demonstrantur, astronomicaeq[ue] supputationes ad solam ferè vulgarem additionem reducuntur : opus vtilissimum astronomis, geometris, arithmeticis, perspectiuis, architectis, praecipuè militaribus, mechanicis, geographis, nec non ipsis philosophis naturalibus (1632)
Pars Tertia.Cap VII: 299 Detur femicirculus, da o,incuius diametro, do,fumatur,d i; Sinus verfus arcus,da c,& infuper;g pydifferentia Sinuum ver fum arcuum.d bd csfumpto. 00 autem arcusb a, @quali ipfi, cd,fity,dcba; aggregatum, |’ … de, à pundis autem,c,b.4,€, cadant perpendiculares fuper diamettum; d o.ipfe cpbg,ahs e 1 a,c, ducatur,c f parallela, do, cadant autem,c p.in,p; bg, in,g.ah, insh,&,e i,in,i; Quia ergo,vt eft.id, ad,pg.ita sfipta, do, comuni altitudine,re&ang., 0 di, vel quadratil, de, ad re» tangulum fub,o…
Trigonometry -- Early works to 1800 · Logarithms -- Early works to 1800 · Logarithms · Trigonometry
Internet Archive · Fisher - University of Toronto · Public domain (published before 1931). Free to use for anything.
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