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Simplifying 0 = 2cos2x + 3cosx + -2 Reorder the terms: 0 = -2 + 3cosx + 2cos2x Solving 0 = -2 + 3cosx + 2cos2x Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-3cosx' to each side of the equation. 0 + -3cosx = -2 + 3cosx + -3cosx + 2cos2x Remove the zero: -3cosx = -2 + 3cosx + -3cosx + 2cos2x Combine like terms: 3cosx + -3cosx = 0 -3cosx = -2 + 0 + 2cos2x -3cosx = -2 + 2cos2x Add '-2cos2x' to each side of the equation. -3cosx + -2cos2x = -2 + 2cos2x + -2cos2x Combine like terms: 2cos2x + -2cos2x = 0 -3cosx + -2cos2x = -2 + 0 -3cosx + -2cos2x = -2 Reorder the terms: 2 + -3cosx + -2cos2x = -2 + 2 Combine like terms: -2 + 2 = 0 2 + -3cosx + -2cos2x = 0 The solution to this equation could not be determined.
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