(40) = 



II. Sit « zn 2 ; -h I , crit 



fjn. (2 ;■ -H i) (J) = 2--' fin. fin. C-l-^ -h C|^) fin. (_ii- — (b) x 



X fin. C-i^ H- Cp) lin. (-^i^ (b) fin. (-^ n- (1)) x 



>, fin. (_i^ - Cp) . . fin. (-ni_ _H Cp) fin. (^iA _(p). 



§• *5' Qiioniam iiic omncs f:i(flores pracrer cof. C^ 

 funt finus , eos, fi liibcr, iii cofinus conuerrcrc pofumus, ope 

 fi)rmul:ie fin. ^4^ ~ coC. (^- — \4/), ac pro binis cafibus principa- 

 libus recjuentes exprcliiones repericmus: 



Si n — ii^ crit 



fin. 2 /■ Cp — 2*' — ' fin. (J) cof. Cp coC. ( ' h- <P) cof. rr — (f)) x 



X COC. (^ H- (I); Cof. (^^'' — (p) cof. (^ -+- (p) X 

 :< COC (ii' — (p) COf. (i-'' -+- (p) Cof. (y — (J)) X 



X . . . . cof.Cirilf-^-^p; cof. Oi:il-f — (p). 



Si « = 2 /-1- I, ci'it 

 fin. (2 r -+- 1) (|) = 2"-' fin. (p cof. (^-.^^ -f- (J)) cof. f^ .?^^ - (|)) x 

 X cof. {^^ H- (p; cof. ( J-^ - (p; cof (^-^ -^ (p, X 



X COf (-'1- — (P) .... COI'. ("-"gH-(|))x 



X cof. C-i-^ii-^ — (!)). 



§. 26. Cum igitur duplici modo anguli muliipli n (|) 

 tam cofinum (]uam finum pcr fiaoics lccuiuium finiis fiuc co- 

 finus proccdcnics cxliil)ucriiTuis , liic illas cxprcliionci inucntas 

 coniundim antc oculos cxponaiiius; 



1. Si 



