-»-^.^ ) 72 ( ^H^" 



conflat eflc 



fin B A D nz - ^ ^'""' ^ /'"• ^ f^ — "^ /'t - ^' — ^) /'"'^- (^ — c) 



Jiii.bjin.c ' 



ideoque ob 



lin. B L — fin. A B- fin. B A D — fin. /l fin. C , 

 fict omnino 



fi n B L — 2 V fifi.-s Jin. (^ — a) J;n. (5 - M /m. Cs - c) ^ 



Jin. 



§. 18. Thenrema IT. ,5'/ circulo minori , fiterit in- 

 fcriptum triaJiguhiin A B D, erit pro diftantia poli C a pe- 

 tipheria circuli ijlius minoris , 



tang. B U ~ — ^ ^ . 



V (in. j- fin. {s~a) lin. (J-Z'j fin. [s ~ c) 



Dcmonfir. Nam pcr Theor. X[. cfl: 



„ ^ -fin.i A B . fin. |BD 

 ^'"S- ^ ^ =^ -fh^TBL.cof.iBU ' 



fiiffcclo igitnr valore ipfins lin.BL, ex Theor. XH. pro- 

 ciic omnino 



„P 2 fin. I fl fln.l ^ fin. ' ^ 



^^"^* ~ y fin. TTfin. (i-flj fin. (j-^j fin. {s-c) ' 



§. 19. Thcnrema. XIV. Si in trianguJd ABD, 

 arguU A , B , D refpe&iue exprimantur per Utteras A^ JB, C, 

 trit quoque 



„ ^ tane. \ a tan?. ^ h tang. ■ ^ 

 tang. B C — — -1— ^— . 



^ cof. i(A-i-B -H C) 



Demonftr. Supra §. 13. demonrtrauimus efle 



cof. 



