Hinc Ci breuitatis gratia exprimantur tang, | A ; tang. l B> 

 tang.iC; tang. j D refpediue per litteras p, ^, r, j, fiet, 



cof.;(a+^+r+^) *; cof.^(«-^-c + (jfj r^* 



fin^+£+_^-tf)_yp9 . fin.^a^ + ^ + f-t/) __ ypjr^ 

 fin i{a-\-l?-(; + d) rj' fin.^a-^ + c+^) qs' 



Hinc autem colHgitur: 



tang. iCa-^c) tang. -; C^ 4- ^) = l-^JfH i 

 tang. t (a - tang. -; (^ - ^) ^r ^^li 



tang. -:(<»- O cot. ; (6 -t- ^) = J-^-^; i 



cot. -: (^ 4- tang. ; (^ - ^) = ^|^-^ , 

 indeque 



tang. K^ + tang. t (^ - .) = '^|^: . ^^^, 



■ (, -j- r i) Vp (7 -f- (. -f- p ,^; vr s ' 



t^ng. -: '{b + ^ tang. : ib - ^) :=: |^|f,' . ^^^^ 



■ — ' (■ ->- <7 y) V p r — (i -f- ^ r) V 9 s ^ 

 (>-+-« s) Vl> r -4- (i -j- p O V^i J' 



Hinc autem deducitur 

 'Co{.ic:coUla-(i~\-rs)Vpq:{i-i-pq)Vrs:iyj^^ : ^ et 



cof.-;^:cof.l^-(i-H^iJl^/)r:(i-+pr)y^J=:,-^ • 7^., 



vnde coUigitiir 



y fin. ; A fin. l B cof l A cof ; B 

 cof. . . : cof. . . = ^,.^A-B) = 



y fin.iCnn.-Dcof: ;Ccof:;D_.^^^^^„B.yfl„^Cfin.n 

 cor.i(C-D) 



ob A-B:r;C-D, quae proprietas aliunde quoque de* 



mon- 



