âfe )■ o c ® 
ai? 
Cor. X. Si r = erit Cof. v. Cof. x == 
Cof. ar 
i 
+ ? 
Cor. 2. Si Cof. rl esfet evolvendus, habetur 
— [3 — , a Cof ar. Cof. v 
Cof. rl = Cof. rl . Cof. r == ~ 
2 
Cof. r Cof. 3r Cof r Cof. r Cof. gr 
H = ä + ~ — — i = - — — 
2 4 4 * 4 
g Col. V .4. 5 
+ : . Similiter erit Cof r| = Cof. ri. 
Cof. v — 
Cof. 3r. Cof. r f 3 Cof r. Cof v Cof. 41? 
___ - 8 
3 Cof. 4 ï> 
+ 8 = % 
Cof. 2 V 3 Cof. 2V 
+ — + — T“ 
4 Cof. 2r 3 
+ 4 * 
8 8 
Hinc confiât modus evolvendi Cof. ri*, & pro- 
gresfio feriei hune valorem exprimentis ex hifee 
Facile colligi poteft. 
PROP, g- 
Stantibus iisdem ac prius , erit Sim v. Sin. x =2 
Cof. r -\- 1 x Cof r — x 
— - - -• * 
‘Demittatur a pun&o / ad re&am DFnormalis JL. Ob 
fimilia triangula ACH^DIL, erit AC:CH.iDl;lL> hoceft, 
D d 3 Sin. v. 
