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Simplifying 3cos(2x) = -3cosx Remove parenthesis around (2x) 3cos * 2x = -3cosx Reorder the terms for easier multiplication: 3 * 2cos * x = -3cosx Multiply 3 * 2 6cos * x = -3cosx Multiply cos * x 6cosx = -3cosx Solving 6cosx = -3cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '3cosx' to each side of the equation. 6cosx + 3cosx = -3cosx + 3cosx Combine like terms: 6cosx + 3cosx = 9cosx 9cosx = -3cosx + 3cosx Combine like terms: -3cosx + 3cosx = 0 9cosx = 0 Divide each side by '9'. cosx = 0 Simplifying cosx = 0 The solution to this equation could not be determined.
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