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Simplifying 8cos(2x) = -8cosx Remove parenthesis around (2x) 8cos * 2x = -8cosx Reorder the terms for easier multiplication: 8 * 2cos * x = -8cosx Multiply 8 * 2 16cos * x = -8cosx Multiply cos * x 16cosx = -8cosx Solving 16cosx = -8cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '8cosx' to each side of the equation. 16cosx + 8cosx = -8cosx + 8cosx Combine like terms: 16cosx + 8cosx = 24cosx 24cosx = -8cosx + 8cosx Combine like terms: -8cosx + 8cosx = 0 24cosx = 0 Divide each side by '24'. cosx = 0 Simplifying cosx = 0 The solution to this equation could not be determined.
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