SOLUTION: please help me solve for all 2cos(x/2)+1 =0

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Question 622016: please help me solve for all
2cos(x/2)+1 =0
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
solve for all
2cos(x/2)+1 =0
2cos(x/2)=-1
cos(x/2)=-1/2
x/2=2π/3
x=π/3+2πn, n=integer
and
x/2=4π/3
x=2π/3+2πn, n=integer