SOLUTION: could you help me find all the solutions in the interval [0, 2pi) 3cosx=cosx-1

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Question 851884: could you help me find all the solutions in the interval [0, 2pi)
3cosx=cosx-1
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
could you help me find all the solutions in the interval [0, 2pi)
3cosx=cosx-1
2cosx=-1
cosx=-1/2
x=2π/3, 4π/3 (in quadrants II and III)