SOLUTION: find all solutions to the equation cos x=-1. possible answers: x=pin x=2pin x=pi/2+pin x=pi+2pin

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Question 94681: find all solutions to the equation cos x=-1.
possible answers:
x=pin
x=2pin
x=pi/2+pin
x=pi+2pin
Answer by Nate(3500) About Me  (Show Source):
You can put this solution on YOUR website!
cos(x) = -1
For the cycle: [-pi,pi]
x = +- pi
period: 2(pi)
For any integer "n"
x = +- pi + 2(pi)n
graph%28900%2C250%2C-13%2C13%2C-1%2C1%2Ccos%28x%29+%2B+1%29