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Simplifying cos2x = 2 + cosx Solving cos2x = 2 + cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-1cosx' to each side of the equation. -1cosx + cos2x = 2 + cosx + -1cosx Combine like terms: cosx + -1cosx = 0 -1cosx + cos2x = 2 + 0 -1cosx + cos2x = 2 Reorder the terms: -2 + -1cosx + cos2x = 2 + -2 Combine like terms: 2 + -2 = 0 -2 + -1cosx + cos2x = 0 The solution to this equation could not be determined.
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