SOLUTION: 8 cos^2 x-4=0, how do you get pi in the answer?

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Question 558521: 8 cos^2 x-4=0, how do you get pi in the answer?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
cos^2 is a trig function; the argument (x) is an angle

pi in the answer means that the angle is measured in radians instead of degrees