SOLUTION: If sinX=1/2 then x=30. Is its reference angle 90+30 or 180-30?

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Question 1028604: If sinX=1/2 then x=30. Is its reference angle 90+30 or 180-30?
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
I know what you are asking, though it sounds like you're a bit confused...
For an angle of 30 degrees in quadrant I, the reference angle in QII is 180 - 30 = 150 degrees.