64 
Cc. J. MERFIELD. 
tan ¢@ = 3 tan 6 
tan @ or | tan ee 
(ren . 
m 
Peg cc ae 
tan 0 = iat Area A = |. 
2 4 
g= a+r - 4% .; etc. 
x x 
s = (1+ 1% ma* — § m*x* etc.) 
a= 20 + o tan? § — 2% tan* @ etc.) 
s = «(1+°1 tan® ¢- -0138 tan* ¢ etc.) 
CC' = R{[o-2 (Sin *)]t -0002909 
CC = Ri [w-2 (Sin 2, lt 0002909 taking a’ = * 
3 
CB om al By Et (*@) \ taking 2’ =“ 
and a, = /6Ry. — 2 y” 
L O' = tan ie (R+H) + (a, - “) 
LB =LE = ton” (R+H) 
DA= Sec © (R4+H) -— R 
LV=LV'=tan“ H 
Lo = 
2| 
