(40 



Ex tabiilis niitcm efl 



/ t:ing. ic' - 9,2463188 

 / tang. 60 rio, 2385606 



praebet 



/ tang. ac^^rp, 5610659 

 / tang.4.0 =9,9238135 



/ tg. 10' -t-/tg. 60''- 9,4.8487^'+ / tg. 20^-1-/ tg.40°r 9,48+8794. 

 §. 33. Simili modo formiiLi pro tang. 5 Cj) inucnta 



tang. S (^ — tang. tang. (36- ^ 0) tang. (36° — (J)) x 

 X tang. (72° -+- Cp) tang. (72^ — (^), fiiic 



tang. 5 ^ tang. (i 8° -h (J)) tang. (i 8° — 0) = tang. (^ < 

 X tang. (36- -^ 0) tang. (36° _ 0;, 



hincquc in logarithmis : 



/ tang. 5 C> -^- / t-iiig. fi S" -^- 4^) -I- / t^ng. (i 8° — C|)) 



— 1 tang.Cp -j- / tang. (36^ h- (p; -H / tang. (36"— CP). 



Sit cxcmpli gratia CP — 10'', critquc 



/ tang. 50 -I- / tang. 28° -h / tang. S' 



— / tang. iG°-h/ tang. 46^ -f- / tang. 26", 



vchiti in fcqucntc fchcmatismo vidcrc hcct : 



/ tang. 50'rio, 0761 865 

 / tang. 28 r 9,7256744 

 / tang. 8 = 9,1478025 



/ tang. 10° = 9,2463188 

 /tang.46 1:10,0151628 

 / tang. 26 - 9,6881818 



Summa = 8,9496634. 



§. 34. Quoniam igitur haiflcnus tam fmus ct coHnus 

 qunm tangcntcs nngulorum muhiplorum ptr prodiKfia cxprcs» 

 fimus, iftas formulas commodc jcr iogaritJHT-os cuolucrc licc- 

 bit , qui deinccps pcr diffcrcntiationcm toili potcrunt , dum 

 fcihcet nngulus Cj) tanqunm vnriabihs Ipcfiatur. 



/ tg. 50V/ tg. 2sV/ tg. h- S, 94^663 + 



Euohi- 



