=== (44-) === 



III. Refblutio tangentis 

 anguli «0 in fa£lorcs. 



§. ^ip. 1(1:1 rcCoIutio pcciiliari Aunlyfi non cgct , pro- 

 ptcrei qiiod tang. ;; Cj) — •(^'L^ , qiumobrcm tantum opiis clt, 



■vt fingiili factorcs ipfius fin. « diuidantur pcr fingulos fa(fto- 

 res ipfius cof « cp. Cum igitur tam pro finu quam cofinu 

 dupliccm dcdcrinuis folutioncm , ca combinationc vti conuc- 

 iiict , quae fimplicinimani roiutioncm fuppcditat. Hic autcm 

 itcrum duos caiiis a fc inuiccm dillinxiirc iuuabit , prouti nu- 

 mcrus n fucrit vcl par vel iinpar. 



I. Cafus quo n — z L 



§. 30. llic primo cafus fpccialcs cuolu.imuSj tribucn- 

 do numero ;; valores 1,2,3 crc. crirque 



^ fin. (t) cof (h 

 tang. 2 Cp — J— -I , 



cof (i ^ — (p; cof (3 f H- Cp; 

 tang. 4 Cp =: fi"- cof C p cof ^ ^ -f- Cp ) cof G f — Cp) ^ 



cof(i^^-HCp;cof(i^-Cp;Cofa,^-»-CpJcof(:l^-<p/ 



Cum igitur hic nulla contracftio locnm inucniat, has cxprcrilo- 

 nes viterius continuarc iupcrflunm forct; at quando ;/ cll nu- 

 nncrus impar, ob contractionem formulac prodcunt notatu nia- 

 ximc dignac 



II. Cafus quo « = 2 /■-}- r. 



§. 31. Loco / crgo fumamus fuccciHuc numcros 0, 

 I, 2, 3, ctc, ac primo quidcm : 



Si i — o ct ;/ m I , crit 



tang. Cp — '"• J . 



Si 



