TRIGOKOMETRlCOSmAERlCUM. 3 3 



in II. Tom. Commcnt. p:ig. 23. atqiic trad.iri lc- 



qucntc modo : 



I - - C— '-^r adcoquc 



- - - ^— 'i^^=^ ircm 



3 - - Qp^^r, adeoquc 



rrs-jxQ. 



+ - - s—^ry- 



cx aeq. 2 ct ^ flt 

 5 - - /.vCv-f-)=rczrr3s;-;y;r2 



liibllituaiitur pro/et j- acquivalentia 



fc./— ^- et^v-nrr— .v.v. Fiet ita 



C . . txLy-xxvz—— -p — 



dividatur aequatio per ^.v ct transponantur termini 



Q, r.VQ. roca , 

 -f-— — -r vcl 



8 . . Cv-l-AM-^^C ob^f-i^M) 



Qiiod fi idem calculus pro altero triangulo .fPZ 

 repctatur , invcnictur denuo 



9 . . cy-^-am^-f- 



igitur ex 8 et 9. fict porro 



10 . . ( t-C )J-f-^/w-AMzzo- five 



. AM-arn. /-v T^ T 



II- J— -Tc- Q; E. J. 



3. Formula igitur infervit inveniendo literi 

 PZ, quo dato, reliqua omnia per communia prae- 

 cepta trigonometrica indagari poflunt. Cetcrum 

 ut formula ad calculum aptior fiat , ponatur finus 

 fcm-ifummae angulorum SP2 et jPZztN, finus vero 

 femidiftcrentiac =;/. Ita fiet c-Q—^J^ ( per §. 9. 

 pag. 17. commcntar. Tom. II. ) ct confequen- 



AM -am 



Tam. iV. E X. No- 



