If 2 cos θ = 2 - sin θ, then what is the value of cos θ?

If 2 cos θ = 2 - sin θ, then what is the value of cos θ?

1). 1 or 3/5
2). 1 or -1/2
3). -1 or -1/2
4). -1 or 3/5

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