Question 814592
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
find the angle made by a ladder of length 4m with the ground 
if its one end is 2m away from the wall and the other end is on the wall
<img src=" http://upload.wikimedia.org/wikipedia/commons/thumb/7/7e/Trigonometry_triangle.svg/200px-Trigonometry_triangle.svg.png ">
 cos &#952; = adj/hyp = 2m/4m = 1/2  ,  &#952; = 60° 

&#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;