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

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Question 622502: please help me solve:
2 cos(x/2) + 1 = 1
Answer by KMST(5328) About Me  (Show Source):
You can put this solution on YOUR website!
2+cos%28x%2F2%29+%2B+1+=+1 --> 2+cos%28x%2F2%29=0 (subtracting 1 from both sides of the equal sign.
2+cos%28x%2F2%29=0 --> cos%28x%2F2%29=0
x%2F2=pi%2F2, and x%2F2=3pi%2F2 are solutions
So are all angles co-terminal to those two, and the whole set can be written as
x%2F2=%282n%2B1%29%2Api%2F2 for all n integers
So the solution set is (multiplying both sides of the equal sign times 2)
x=%282n%2B1%29%2Api for all n integers