3.810 The smallest root of 



is 



3.811 The smallest root of 



s 



3.812 The smallest root of 



s 



3.813 



The first roots are: 



TRIGONOMETRY 



- cos 6 = o, 

 = 422o' 4 7".3 



xe x 2 = o, 

 x = 0.8526. 



log (i +x) - J# = 

 x = 0.73360. 



tan x x + - = o. 

 x 



4-480, 



(1. c. p. 353.) 



(1. c. p. 353.) 



(1. c. p. 353.) 



3.814 



The first roots are 



#3 = IO.QO, 

 #4 = 14.07. 



(Collo, Annalen der Physik, 65, p. 45, 1921.) 



cot x + x = o. 



x 



Xi = O, 



#2 = 2.744, 



#3 = 6.II7, 



#4 = 9-3I7, 



#5 = 12.48, 



#6 = 15.64, 



X 7 = 18.80. 



(Collo, 1. c.) 



3.90 Special Tables. 



sin 6, cos 6: The British Association Report for 1916 contains the following 



tables: 



Table I, p. 60. sin 6, cos 9, 6 expressed in radians from 6 = o to 6 = 1.600, 

 interval o.ooi, 10 decimal places. 



Table II, p. 88. 6 - sin 6, i - cos 0,0 = o.ooooi to d = o.ooioo, interval 

 o.ooooi, 10 decimal places. 



