120 A NEW METHOD OF DETERMINING 
From 
Il =a —2 —® 
inl’ = 7! — OY — 
we have 
esl God 55/2 Ue —— OG OCeAe. ee: 
_ Then from 
k sn K = cos Jsin Il’ 
k cos kK = cos II’ 
ie, Si [kG = sin IT’ 
k, cos K, = cos J cos Il’ 
p sin P = 2a? — 2uk cos (II— EK) 
p cos P = 2a cos 9’ k, sin (11 — A) 
vsin V = 2a cos > ksin (11 — KX’) 
v cos = 2a cos 9 cos 9’ k, cos (1I— 45) 
w sin W = p— Qa? sin P 
weos W= v eos (V — P) 
w,sin W,= vsin( V — P) 
y 
w, cos W,= 2a?* eos P, 
é 
