Ergoy^^ 



C 47 ) 



I . arc. tajig. — -r + conft. 



S XLL 



Est autem in formula C^.) valor tangentis talis, ut 

 partem cotnpJectatur conftantem , partem variabilem* 

 Hancce partem conllantem referre posfumus ad illam quan- 

 titatem conllantem , quae fcinper integral! est addenda. 



Sit , lit hoc liat , tang, (yf 4- B^ = — ^=====^ t atque pars 



conftans tang. B — 7.^ * lam autem 



tang. (^-|.5)-.,^^^„g^ ^^^,;g^ ^ ; igitur tang. ^+tang.5 

 = tang. (^+5) —tang. A tang. B tang. (^A^B.^ 



^ tang. r^4- J5)— tang. J5) V^---^^ VaP- 



tansS A ^ 



'ta* '-' i+tang.jBtang.(^-J./j)— " i^ C:v;4' ^ 



1 + ^2 ~^» 



— y y tfg — ^* .^ a: V/;2~>^»_ 



Undey -^^-^^^,^^^~ ::zBIogn.va''^-^<xbx'^x^ 

 1 a^ — b^ a^ — b x 



Er- 



