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Simplifying 2cos(2x) = 1 + -2cos2x Remove parenthesis around (2x) 2cos * 2x = 1 + -2cos2x Reorder the terms for easier multiplication: 2 * 2cos * x = 1 + -2cos2x Multiply 2 * 2 4cos * x = 1 + -2cos2x Multiply cos * x 4cosx = 1 + -2cos2x Solving 4cosx = 1 + -2cos2x Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '2cos2x' to each side of the equation. 4cosx + 2cos2x = 1 + -2cos2x + 2cos2x Combine like terms: -2cos2x + 2cos2x = 0 4cosx + 2cos2x = 1 + 0 4cosx + 2cos2x = 1 Reorder the terms: -1 + 4cosx + 2cos2x = 1 + -1 Combine like terms: 1 + -1 = 0 -1 + 4cosx + 2cos2x = 0 The solution to this equation could not be determined.
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