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