-*^i ) 38 ( |c§<.. 



§. 24. Quod quo clarius appareat notctur efle 

 p=:d tang. ^ ^, q = b tang. ^ 7; , r — ^ tang. ^ $ ; 



praeterea vero 





COf. ^ <^ COl. i V] cof. i d ' 



Gum igltur etiam pro hoc cafu prodeat R — j)f H-PQ 

 erit 



^_ _ •-i+f]n.^2 ;rin.^vi . 



cof. ^^ ~" cof. i < cofrrv 



ante autem inuenimus, 



, A — fin. ; ^ — fin. ; VI 

 tang. l =: -^ ^ , ' ' , 



COf. , < COf. ; 7) 



vnde haec aequatio per iliam diuifa praebet 

 - , » — fln ^ <^ — fin. : V] ^ 



I -i^ fin. ^ qiin. : i^ 

 fin. ^ a + fln.i <^+ fln. ', v] + fin. ', ^ fin. ^ ;; fin. 'J = Oy 



in qua aequatione terni anguli ^, j/ , funt permutabiles, 

 quemadmodum rei natura poftulat, quae proprietas in va- 

 lore primo Inuento non tam erat manifefta. 



§. 25. Quod fi ergo terni anguli ^, vi, 0, ita a 

 fe inuicem pendeant, vt fit 



{in.^A-dn.lyi-^-Cw.l e-j-fin.^ ^fin.^ V] fin. ,^ ^zr o, 



tum in parabola terni arcus his anguhs ^, y^., ^ refpon- 

 dentes femper ita erunt comparati, vt fit 



T:l-\-T •.y[-\-Y:^ = b tang.^^ tang. -; 7/ tang. i &. 



Hinc fi dati fuerint bini angnh ^ et 7/, tertius ope for- 

 mulae primum inuentae facilhme definitur, qua erat 



tang. 



