J758. Jul. Aug. Sept. 1^7 
Theorem. 3. 
fizsinz^^CofJ"-^, eller fdzm^Cof:^^ 
I 
■r — — - " r r \ 
w — I. n — 3 I >v 
— J-*- 
4» . ■ ■ • jdz$inz C$fz ♦ 
Theorem. 4. 
J »+1 
^^^fdzsinz^^Cof^^^^ eller' 
fdzmz^^Cofz'' ^^u^^^^ 
»+i.»+ä »+3. »+f 
