-"^.i ) 34- ( lf€<- 

 Statiiamus porro 



Tizfin.i^-fin/-l?-}fin/A''-. • • .-h fia^^p^ 



Vt flt 



2 S cof. ^ — (i - ^) fin. "J -h j. 

 lam iterum multiplicemus per 2 cof. ^ , et adhibita ea- 

 dem redudione reperiemus: 

 - 2Tcof,^=zfin.^-p:-fin.Lp + fin.il^. . .+fin.«7r 



+fin.:!^-fin.il?+fin.iiZ-fin.lJ5 --i-- fmJ^^L^^ 



vbi, deftrudis terminis qui fe mutuo tollunt, obtinebitur: 



^Tcof^-f zrfin.'^^ + fin.«7r — fin."-^, ob nTt-o. 

 Quia igitur cfl: 



fin. '^ -- 2 fin. ^ cof. ^, erit T — fin. ^^- , 

 quo valore fubftituto fiet 



2Scof.^-J=rfin. ^, 

 ideoque S~ltang. ^^, confequcnter noflrae formulae in- 

 tegralis, cafu x — 00, valor erit ^tang. -^, vnde nafci- 

 tur fequens 



Theorema. 



§. 36. IJia formula integralis: f -_;;; — Tk , 



a tcrmino x = o vsque ad terminum x — 00 extenfa, pro- 

 diicit hunc v^ilorem: :j tang. ^. 



Scholion. 



§. 37. Cum baec formula duabus confiet parti- 

 bus, fi fimili modo, vt fuprn facflum e(t, in valorem vtri- 

 vsque fcorfim inquirere vclimus, vtriiisque v.ilor adco inia- 



gina- 



