Question 816808
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
In triangle ABC, angle B = 30°, a = 210, and b = 164. 
The measure of angle A to the nearest degree is?
Using the Law of Sines
 {{{(sin 30)/164 = (sin A)/210}}}
{{{(1/2)/164 = (sin A)/210}}}
   105/164 = sin A,  A = 40°  rounded to the nearest degree

&#952;	radians	sin &#952;	cos &#952;	tan &#952;
0°	0	0	1	0
30°	&#960;/6	1/2	&#8730;3/2	&#8730;3/3
45°	&#960;/4	&#8730;2/2	&#8730;2/2	1
60°	&#960;/3	&#8730;3/2	1/2	&#8730;3
90°	&#960;/2	1	0	&#9472;