'i5o 



DG-f, TV=zq, DY-p, VR — »,fR = v, arctis 

 DT=;0, MZ — u, DZ — t, MN = w, NZ~n, arcus 

 „> DM^vj/ sinusque anguli BACc=:{3. 



Cadit in oculos-, expressionem pro applicata y curvae 

 quaesitae hic iterum eandem foie ut in Probl. I, nempe : 



Itaque tantum superest abscissam x definire, hocque eftici- 



tur in sequentibus : 



Ob RZ~t-/j + w erit NR±n-t + p-w, hincque 



rvn MZ . Njl u(a:— t -+ - p lu) 



^ ** M N ' m y 



unde fit : 



A r> . OR OR - u.(ti — f-f - f> — w) 



srin. (i8o°— iBAC) sin.BAC (3 m 



At TX = q(q - f) -r v ' ip - t) (sol. Pr. î.), 

 ergo: 



RX — TX — TR — i(i-^±.-<L-Ù^ v .. 



hincquo : 



A X — x b u(n — t-*-t — w j ■ iu(j> — c— -w) — /$ 



undc denique sequitur fore : 



- 7 i >'{n — t -f- p — i u) i tw(f — e — w) — /g - 



' |3 ni ■ • v ' 



Gorollariumi. 



Cuai sit i8o°— ZBAC=ZTRV- Z.MNZ, erit: 



»in. ^BAC = (3 — sin. TRV. cos. M N Z — cos. T R V. sih. 



