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Simplifying 6cos(2x) = -6cos(x) Remove parenthesis around (2x) 6cos * 2x = -6cos(x) Reorder the terms for easier multiplication: 6 * 2cos * x = -6cos(x) Multiply 6 * 2 12cos * x = -6cos(x) Multiply cos * x 12cosx = -6cos(x) Multiply cos * x 12cosx = -6cosx Solving 12cosx = -6cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '6cosx' to each side of the equation. 12cosx + 6cosx = -6cosx + 6cosx Combine like terms: 12cosx + 6cosx = 18cosx 18cosx = -6cosx + 6cosx Combine like terms: -6cosx + 6cosx = 0 18cosx = 0 Divide each side by '18'. cosx = 0 Simplifying cosx = 0 The solution to this equation could not be determined.
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