DE RESOL. rCLYGON'. RECTILIKEOR. Si 



IIT. ^fin.A + ^lln.CA-f B)4<-rin (A-f EJ-C)~o; 

 1 \'. ^ li ii. A + ^ fm. ( A + B) - c fin. Dzz-O 



qiias <]uein.idmod«iii iradari oportet , vt pro qna- 

 \is (]U;iellioiie propofita sptas dcnt folutioncs , nviuc 

 crit difpiciendum. 



2. Problcma i. Datif latfrlbus s,b, c fjzw an' 

 luiif B, C inuenire latus d. 



Pcrfpicuum cft huius Probkmatis folutlonem ex 

 acquationc noIUa prinia adornari , per eam enim fit 



^2'rt'=fl^l-i;i?+a-+ ifl^ cof.B-f- 2/7 fcor.(B-i-C)-f 2k cof.C. 



Cactcrum quum cx aequatioue dum fic exprimitur, 

 valor ipfius d niinus commode inucftigctur , neces- 

 fum cfi vt eandcm in tormas aliquanto commodio- 

 res transmuttmus. P^ft vcro 



( a fm. B - (T G n. C)'+ (i» 4- <? co(. B -f <• coi; C)' 

 quarc fict 



dd-{a fin. B -cfin.C)' + (i' + ^cof. B+<-cof.C)% 



tum igitur fi quacratur 



Taiig. ^^.-'"^^-'^vS-^conrequemur ^-&-t-«c,f.B-t-cc./.c, 



Vel iiiutlligatio ipfius d fequcnti ratione pcrtici po- 

 tent : quum fit 



aa-^bbA a-+ 2tfi;cof.B+2 ^7f cof.CB^-C) + 2 ^t^cofCr^ 

 t«+^„.,BH-o "t- {c t ~-^—^] + > coni^-t ».;,tf+ __--^j, <:-f _^p 



quod facile pattbit fa(fta cuolutione pofttnons for- 

 inae , flatuamns • 



'iom.XA. iNou.Comm. L ita 



