48 A NEW METHOD OF DETERMINING 
have found 
(m) 
gh — Thx 2 ima : OP 
(i=) 
=In -Y; 
if 
m=h—i. 
Again supposing 
; +o (h) ‘ 
— 2 
= O) . Of 
+o  (é) 
y' = 2s JP, ° Zz 
we have found 
Thus we have 
(h—t) 
ee ; 
S=dhx oh 
(h—2) 
= Sn [ cos de + sin ve »/ =, 
fase RA 
y = h Jin °& 
(h-~) 
— sdhn [ cos hg + sin hg v= : 
Hquating real and imaginary terms, we have 
z 7 h=o (h—1) 
cos te = =. 2,» Um - cos hg, 
(29) 
h=n (h—) 
sin ve = 2 Ji, « Bin hg. 
h=-o 
