SOLUTION: Hello! I need help solving this: Find all solutions of the equation in the interval [0, 2π). 4 sec2 x − 4 = 0 Thank you

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Question 978116: Hello!
I need help solving this:
Find all solutions of the equation in the interval
[0, 2π).
4 sec2 x − 4 = 0
Thank you
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
4 sec2 x − 4 = 0
4 sec^2x=4
sec^2 x=1
sec x= +/- 1
1/cos x = +/- 1
cos x is 1 at 0 and at 2 pi