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Simplifying 2cos2(x) = 8cos(2x) + -1 Multiply cos2 * x 2cos2x = 8cos(2x) + -1 Remove parenthesis around (2x) 2cos2x = 8cos * 2x + -1 Reorder the terms for easier multiplication: 2cos2x = 8 * 2cos * x + -1 Multiply 8 * 2 2cos2x = 16cos * x + -1 Multiply cos * x 2cos2x = 16cosx + -1 Reorder the terms: 2cos2x = -1 + 16cosx Solving 2cos2x = -1 + 16cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-16cosx' to each side of the equation. -16cosx + 2cos2x = -1 + 16cosx + -16cosx Combine like terms: 16cosx + -16cosx = 0 -16cosx + 2cos2x = -1 + 0 -16cosx + 2cos2x = -1 Reorder the terms: 1 + -16cosx + 2cos2x = -1 + 1 Combine like terms: -1 + 1 = 0 1 + -16cosx + 2cos2x = 0 The solution to this equation could not be determined.
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