Adliiic aliii Solutio 

 ciusdcin Pioblcmaris. 



§. 17. Potumus hic ftatim c — fin.?, vt formula no- 

 ftra adimplenda fic 



y{dx*-+- a/) rz a ^ cof. ^ / (i -+- fin. e*) 



r= D ^ cof. ^ / (cof. 0» -+- 2 fin. 0'). 



Fnciamus P — cof. ^ et Q— fin. Q }/ 2 — n fin. > cxiftcntc 

 5 v ~ () t? cof , ct nunc cx §. 4. habcbimus 



_iiL_ — col. a fin. 4-« fin. cof. (t) ct 



_i2_ =: cof C cof. (|) — 7; fin. fin. Cp , 



qunc ncquationcs in coC. d dudac, ob cof 0* — j 4- J cof. ad 

 ct fin. cof — 2 fin. 2 ^ , abcunt in irtas : 



1"' * = fin. -}- cof. 2 fin. -1- « fin. 2 ^ cof ct 



w 9 



'JJL = cof -i- cof 2 e cof (p — /; fin. 2 Cn. , 



hac nutcm porro ob '"[ 



cof. 2 t) fin. = J fin, (0 -+- 2 -^ i fi"- (4^ — * ct ,. 

 fin. 2 cof. =1 i fin. ((p-^zC)—', fin. (0-20), 

 cof. 2 cof. rz ; cof. (0 -K 2 0) -}- ; cof. (0 - i 0; ct 

 fin. 2 fin. z= J cof (0 ~ 2 0) — { cof. (0 -+- 2 ^) , 



transformabuntur in fcqucntcs : 



t^'- — 2fin.0-f-(/;-(-i)fin.(0-+-2O) — (;;-i)fin. (0—2(1) ct 



5/y?~2COf0-^(«-f-l)cof(0-f-2O)-(«-l)Cof.(0-2O- 



§. 18. 



