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## Homework Statement

Find all the solutions of each equation in the interval (0, 2∏)

cos(2x)=1/2

## Homework Equations

-None-

## The Attempt at a Solution

cos(2x)=1/2

2x=(cos^(-1))*1/2

2x= ((∏)/3), ((5∏)/3)

2x= ((∏)/3), ((5∏)/3), ((14∏)/6)

x= ∏/6, ((5∏)/6),

That's all I have.

I know there is one more solution, but I don't know how to find it.

Please help, and thanks in advance.