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Simplifying 2cos3x + 2cos2x + 2cosx + 1 = 0 Reorder the terms: 1 + 2cosx + 2cos2x + 2cos3x = 0 Solving 1 + 2cosx + 2cos2x + 2cos3x = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + 2cosx + 2cos2x + -1 + 2cos3x = 0 + -1 Reorder the terms: 1 + -1 + 2cosx + 2cos2x + 2cos3x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 2cosx + 2cos2x + 2cos3x = 0 + -1 2cosx + 2cos2x + 2cos3x = 0 + -1 Combine like terms: 0 + -1 = -1 2cosx + 2cos2x + 2cos3x = -1 Reorder the terms: 1 + 2cosx + 2cos2x + 2cos3x = -1 + 1 Combine like terms: -1 + 1 = 0 1 + 2cosx + 2cos2x + 2cos3x = 0 The solution to this equation could not be determined.
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