Question 619831
<pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
Solve each equation for 0 less than or equal to theta less than 360
cos&#952; = -1/2    &#952; is  120°, 240°
See below the (cosx, sinx) summary
<img src="http://www.math.ucsd.edu/~jarmel/math4c/Unit_Circle_Angles.png">