Finding the angle of resultant force below the x axis in statics

[cking]

I got all of the problem correct except I can't seem to get the angle of FR below the x axis! Maybe it's because its 10:30 on a Saturday night and I'm trying to do some statics before going out(lol) that I just can't seem to get it... Please Help!

 

[tms]

Your attempted solution is not at all clear. Try decomposing each of the forces into their components.