-1^.^ ) "3 ( m<- 



hincqiie 



V ^ V (e e -\- ^S e g t cof. ^ -{- ^^ E g g t t)f 



Deindc nb d't> — — d^ binae priorcs aeqiiationes abeunt io 

 I. q(d^-d^)zzi^[^ dt cof. (^ - 0). 



qunrum haec per illam diuifa dat 



d q frn^^ —J) 



g fd ? — j ?) coiA^ — «J' 



qua intcgrata prodit ^ cof. (^ — ^) =: C, ideoquc 



ycor(^-e):=enn.fcor. (<^-^), 

 vnde valor ipfuis q in prima fubflitutus praebet: 



t (-1 g — < fl^ fm. f co/". (^ — 6) — iS f g J ^ 



ct integrando 



t r.n. f cof. (^ - ^) tang. (^ - $) = C 4- '4f^ f , 

 vbi Ci^efin ffin. (^-^), at 



tang. (^ - e) = tang. (^ - ?) - 0) :. ^T^-^-^^i Ct 



tang. e — _i^?.^gi:^«) 



Sed per hypothefin ell e fin.f r=:^-^-_^j, vnde fit 

 tang. (^ - e) =r tang. (<^ - ^) -4" .^.f " 



hincque angulus ^ facile determinatur : indequc ^~ j'J[^'l ^* 



Q 2 Vcrum 



