16$ SVBSIDIVM 



et ob tt -y rr I habebitiir diuidendo per a 



-H "'^i'~-'. \ ( ?/"-= -4- -z;"-^) -V etc. 



Venim cum fit z^" -}- -y" — 2 cof « Cp, perfpicuum eft 

 fore : 

 aW.(^«-cof.HCp+7Cof(«-i)(p+^Vof(«-4:(p+"-^7;^7'cof'« 



In qua ferie cum ad cofinus angulorum ncgiitiuorum 

 peruenitur notandum eft eos cunuenire cum cofinibus 

 eorundem angulorum affirmatiue (umtonim , fcu efle 

 cof («-W;Cp — cof. (/«-«) (p. (^. E. I. 



C O R O L L. I. 



4 Si fit «— I. erit 2 cof. (p — cof" (p -f- cof (J> 

 :z:2 cof (p; at fi «—2 habetur 2'^cof(p^— cof. 2 (]) 

 H- 2 cof o (p -i- cof 2.(p =1 2 eof. 2 (p -h 2. Sit 

 » — 3, eritquc 2^ cof (p* — cof. 3 (p -J- 3 cof (p -f- 3 cof (p 

 H- cof 3 (p — 2 cof 3 (P -h <J cof. (p. Sit «—4. erit 

 2* cof (P* — cof 4 (p -i- 4 cof 2 (p -f- ^ cof o (p + 4 

 cof 2 (P -{- cof 4 (P, ideoque cum finguli terrr.ini prae- 

 ter medium bis occurrant, ob col o (P — i erit : 



2* cof (p* — 2 cof 4 (p H- 8 cof. 2 (p -f. 5. 



C O R O L L. 2. 



5. Idem hoc femper vlli venit, (juoties « eft nn« 

 merus integer affirmatiuus , vt feries a fine (cripta cadem 

 prodeat, ideoque finguli termini praeter medium bis oc- 

 currant. Medius autem terminus adeft quoties n eft 

 numerus par , cofinusque hoc termino contentus abit ia 

 Ynitatem. 



COROL. 



