108 



Example 1. Given 

 = 25.429, log ft = 1 



a2 = (h+b) (h-b) 



Example 2. 

 loga= 1.057407, 



Given A = 28° 40'.4, 6 = 20.71 Compute B -- 

 a = 11.326, log h = 1.37300, h = 23.605. 



B = 61° 19'. 6 

 A = 28° 40'.4 



(B-A) 



;i+6 = 44.315 

 h-b = 2.895 



1.31618 

 2 



2.63236 



62 = (h+a) (h-a) 



1.54321 

 1. 



2.63237 



It appears that these checks are not all sensitive to the same degree. Experience 

 will assist the computer in choosing the one best adapted to the problem at hand. For 

 example, (1) is more sensitive than (2) when the difference of the angles is less than 

 45° and vice versa. Of (3) that one is better in which the factors are most nearly 

 equal. 



