244 Opuscul4. 
~-d(p* Ch. f '"pj™- <^(^). S h. f cj) pro ^Sh.f(|)5 ^/Ch.^q), 
quod in poflerum ubique faciam , & fefe ofFerunt aequatio" 
nes duae 
' '*{gSh,q(^-^qQh^q(s^~DySh.q(!^(^^Si primura de- 
^Jrtj ■^. mas fecundam 
— — . ( f S h . f C h . f (|5 = Djf C h . ^<^^ dudam in q a 
prima multiphcata per deinde fi primam dudam in^de- 
ducas a fecunda duda in obtinebis 
—-.gg — qq^Sh.qO^^gDySh.q^^qDyQh.qQ? 
y d 
-^f-^gg — i q^Qh.q^^ — qDySh.q^^-^-g DyQh.q(i^ 
Ex his fada multiplicatione per r , divifione per^^ — ^ & 
integrationej exurgunt 
r \ 
«Sh.f j^.(^Sh.^^-^Ch.^9^ q, e. 
. c h . ^ -~r^y . (— f s h . ^ (p-hg c h . ^ ^ ^ " ' ^ ^ • 
Pofita q quantitate evanefcente 5 fi ufurpetur methodus 
adhibita in quantitatibus circularibus , refultabant formulas 
integratx num. I. 
V. Si^^=:^^, duae ultimac formulae ob diviforem = <? 
evaduBt infinit^ , atque adeo inutiles . Duos cafus in unum 
contrahens pono ^ = :!: ^ , ita ut fit j =1 (— j , & //j» 
— itl^iLi. Ut veram integralem in his quoque cafibus ob« 
tineam , praemitto hanc aequalitatem valere -t Dy .Sh.qcp 
~ Dy Qh . q . Utriufque formulae differentia feparatim ca- 
piatur , & orietur 
— — .(Sh.^(pd:Ch.f (t)=::£D_y.Sh.^^ ] atqui formulac 
^ in ventx funt x- 
^——.(Sh.^^mCh.f ^=:D_y.Ch .^q? j qualesi iguur 
— Dj S h . ^ ::::: D .j C h . ^ . Qi E- ^^- 
