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Simplifying -2cos2(x) = cos(x) + -1 Multiply cos2 * x -2cos2x = cos(x) + -1 Multiply cos * x -2cos2x = cosx + -1 Reorder the terms: -2cos2x = -1 + cosx Solving -2cos2x = -1 + 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 + -2cos2x = -1 + cosx + -1cosx Combine like terms: cosx + -1cosx = 0 -1cosx + -2cos2x = -1 + 0 -1cosx + -2cos2x = -1 Reorder the terms: 1 + -1cosx + -2cos2x = -1 + 1 Combine like terms: -1 + 1 = 0 1 + -1cosx + -2cos2x = 0 The solution to this equation could not be determined.
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