SOLUTION: solve equation below on the interval[0,2pi] cos2x=1/2

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Question 1017185: solve equation below on the interval[0,2pi]
cos2x=1/2
Answer by ikleyn(52906) About Me  (Show Source):
You can put this solution on YOUR website!
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solve equation below on the interval[0,2pi]
cos2x=1/2
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Is it cos%282x%29 ?   Or cos%5E2%28x%29 ?

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Comment from student: cos(2x).
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My response: OK.

cos%282x%29 = 1%2F2  --->  2x = pi%2F3  --->  x = pi%2F6 = 30 degrees;   

                 or  2x = 5pi%2F3  --->  x = 5pi%2F6 = 150 degrees.