SOLUTION: solve to the nearest degree for all values on x in the interval 0≤x≤360, 2cos^2x-4cosx+1=0
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Question 865997: solve to the nearest degree for all values on x in the interval 0≤x≤360, 2cos^2x-4cosx+1=0
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Let
Since , throw out the positive value.
and
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