— 76 - 



Für die Behauptung 



Afajbi, aiCi , b2C2) == A(aib2, agCj, biCjl 

 bat man 



Xa^bi = ß - Acotg.9), X.^ei = r^ -^I,2C3 = J' -^ sin ^ 



(ß — y + ~) sin gj cos xp 



Sin (t^ — cp) 



iß — y _i_ -^ : — Sin qp sin t^ 



~ sin [tlf — (p) 



(ß — y) sin "je cos 1^ 

 ^bici = Y - sin {ip - (p) 



V V -A Yk _ (ß-y) siny sin»^ 



*aib2 = "' *a2C2 — ^' »bid — sin (^ _ fp) 



Für diesen Fall muss man haben 



AfXg^l,^ - y) + (A + Yb^ez) (Xb2C2 - -^aob.) 



— Yb2C2 (^b2C2 — y) 



= A(ß _ X3^,, -H -^) + (A + Y,,e,) (Ya2C2 - Xb,c.) 



welche Gleichung sich reduzirt auf 



_ Ay H- AXh2C2 — -"^azbi • Vi,2C2 + y^bzcz = A(3 4- ^-^ 



bici 

 - AX^^ci "+" -^a2C2 • * bici — P • » biCi — "^,j^ 



