Posted by Samantha on Monday, January 11, 2010 at 10:25pm.
If cosx=sqrt{3}/2 and −pi/2<=x<=0 then the exact value of x, in radians

math  Marth, Monday, January 11, 2010 at 10:31pm
The range for x, pi/2 <= x <=0, restricts x to the 4th quadrant.
What angle x in the 4th quadrant has the property that cos(x) = sqrt(3)/2?