Question 938125
Unit Circle...
315 - 360 = -45° 
Same as for 45° only in the 4th Quadrant
 <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
&#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;

(cosx, sinx) Summary Unit Circle
*[illustration wheel_smaller.jpg].