Mr. hutton on 
484 
of £=y gives the value of a the very lame as in the corol- 
lary to the cafe above. 
3. Taking /=^,the expreffion-— - gives 
_ 3 
a - - - 
b = ~ 
2 0 
C 99 
d = - 
79 
401 
Here it is evident, that the value of c—~~ is the fitted: 
number afforded by this cafe; and from it it appears, 
that the arc of 45 0 is equal to the fum of the arc of 
which the tangent is and the triple of the arc of 
which the tangent is 
Or that a= < 
+ - x 
+ --x 
^ 99 
I - 
I - 
3.16 
5* 
+ 
+ 
5 -i 6 2 
5 + 
7. i6 J 
+ 
9. i6 + 
S 8 
7*99 J + 9*99 
- <kc. 
- 8cc. 
3-99 5-99 
Which is the belt theorem that we have yet found, be- 
caufe that the number 99 refolves into the two eafy 
faftors 9 and 1 1 . 
4. Let now t be taken =hand the expreflion 5T—I 
5 + T 
will 
give 
2 
" = i 
b - 
>7 
'=*15 
Where 
