a*. cof. (2/ 



i'. fin. (i / 



a'. fin. (2 i 



i)'^—^- cof. cof. r^-ii-j H- 0) cof. C -jL?- — 4)) X 



X Cof.C-i^ -»-(J)) Cof ( '^ - —<b) COf ( *f - H-±) X 



xcof.( *!_- — (p;...cor.( "-'?--4-Cp)cof.(-^— )(1). 



Pro finu : 

 1) Cp z= 2" fin. Cp fin. (^-JX- -h Cp) fin. (^^ - (p) x 

 . fin. (-^ H- (p; fin. (.;^_ - (p; fin. (J^^ -k (p) x 

 xfin.( '?- — (p). . .fin.(*'? -t- (p) fin. C-lii (p). 



I) (p iz: 2 •-' fin. (J) cof i^^l- -4- (p; cof. (-i-- (p) x 



X cof (-IL- -+- <b) cof. (-^^ (h cof C-lf- -+- 0) X 



X cof (-5i (p). . .cof.{'-^^^^=-^'^-Cp)cof.L-LiiLL?-<l5), 



§. 27. Hinc patet , cafn quo n ^::z 1 j ^ tnm cofinnm 

 quam finum pcr acquaics anguJos cxprimi, vndc fi bin:ic for- 

 mae pro cofinu 2 / Cj) inucntac pcr lc inuiccm diuit.lantur , na- 

 lcctur i(la acquatio : 



1 zn tang. (^^ -^ (p) tang. (/. - (^) tang. (\\ -h (p) x 



. tang. (;; - (p) tang. ([\ -+ <^j tang. (L; _ (p) x 

 X . . . . tang. ('^^-4-(p)t.ing.0iij^?-(p). 

 Hinc igitur fcqucntcs cafus fpecialcs dcducuntur : 



Si / — I , crit 



I = tang. (i f -}- (p) tang. {\ ^ — (J)). 

 Si i — 2 , crit 



I := tang.af-H(p) tang. C^^-<^) tang.(^f-^(p) tang.(3f-(p). 

 Si i — 3 , crit 



