-i- rr — 2r3cof-^^cofXQnX 



— rr cofX'^ cofNJ/* 

 €tf i|l aber rrCi— cofX^ cofv^=) = rr(CmX' + cofX= finvj.»), unb 

 wenn man t»ie^ fubflituirt^ foDann aber am mit finX^ biüibirt, 

 fo ttiri) 



(• + r)^ « + ccfinX*. uu — 2ccrfinX cof X. u + crrcofX* := o 

 + 2cr — 2«TcofX ^ — r''cof^^' 



. finX""* 

 + rr 



+ rrcofX" fiii N^^ — ar^coC-^^ cofX 



finX^ finX 



Sflun ifl CE=CTcotX unb CTrirfniN^, atfo CE = rfin^^cotX 



unb TE = v/(CT^ + CE^) = c= rfinsj. \/(i + cotX^) rrrfinv^ cofecx' 



Ober c = ^'^^ :Darauö forgt ferner 2mfinX coiX = ^^^^"^'c ofX. 



""^ finX ~" 



5(ber eö ift ?!l£.^!£PJ^-2!:!cofX_2r3finN|.2cofX ^ . ,., 



finX finX fi^X ' '''^^"* 



benc ©feicbuns jtt)ifcf)en t unb wscfe^t siebt 

 (c + r)* ft 4- ccflnX^ u;« — 2r5cofX. z« + ccrrcofX^ =9^ 



finX 

 + w.cofX^ — r'»cof-4^^ 



+ 2cr — 2C>TCofX 



linX 

 + rr 



ober (c+r)= {tt+uu)-~2rric-hr) cotX. a-t- rcrrcofX=^ __ ^4(>Qf^2 _. ^^ 

 ^un fann man ferner cz=r^^ fub|lituiren / m man erbart 

 tit ®(et(^un.g 



