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