SOLUTION: cos^2(x)+2cos(x)+1=0

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Question 1026394: cos^2(x)+2cos(x)+1=0
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
%28cos%28x%29%2B1%29%5E2=0

cos%28x%29=-1

Either of these possible:
system%28x=-pi%2Cx=pi%2Cx=0%2B-+n%2Api%29, as long as n is any INTEGER.