C 290 ] 
-f- i — 2 k X cof. QS P. Aflumatur jam angulus s 
qui lemper fit ad angulum QSP in ratione n ad 1, 
Critque QSP =± ~s, et pofito kk -f- 1 = tt, et ~ tsz 
1 
-T- 
b } erit u? — V- x 1 — - b cof. — s, hincque = 
71 
• n-* 
XI — b cof. ~j‘ . Si b fuerit unitati fere sequalis, 
A 71 - 1 . 
et evolvatur quantitas 1 — b cof. - j 1 1 in feriem modo 
folito, feries ilia parum convergit, eftque ad opera- 
tiones analyticas minus commoda. Series igitur alia 
inveftiganda eft, et quia ex lemmate patet hujufmodi 
quantitatem cof. A P exprimi pofie aggregato termi- 
norum, quorum fmguli ducuntur in cofinus angu- 
lorum qui funt anguli A multiplices, generatim fup- 
ponemus 1 — b cof 
=R4-Scof.-s-l-Tco£-s 
‘ n • n 
4 - V cof. -i-fW cof. — S 4 -, &C. 
Atque ut inveniantur valores coefficientium R, S, 
T, &c. fumatur utrinque fluxio, nempe x fin. j- f S 
X I — b cof. ijl — — S X X fill, -s — T x-i 
n n n n 
X fm. - s — • V x - i X fin. -j — Wx-ix fin. - s — , 
n n n n n r 
Szc. atque ducatur aequatio haec in 1 «— b cof et 
J ;|m J 
fubftituto pro 1 — b cof. - j * ipfius valore R q-S cof. -s 
4 - T cof — s 4-, &c. fiet mb x fin. — s 
• n 1 ' . . n 
X 
