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Simplifying 2cos(2x) = 7cos(x) Remove parenthesis around (2x) 2cos * 2x = 7cos(x) Reorder the terms for easier multiplication: 2 * 2cos * x = 7cos(x) Multiply 2 * 2 4cos * x = 7cos(x) Multiply cos * x 4cosx = 7cos(x) Multiply cos * x 4cosx = 7cosx Solving 4cosx = 7cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-7cosx' to each side of the equation. 4cosx + -7cosx = 7cosx + -7cosx Combine like terms: 4cosx + -7cosx = -3cosx -3cosx = 7cosx + -7cosx Combine like terms: 7cosx + -7cosx = 0 -3cosx = 0 Divide each side by '-3'. cosx = 0 Simplifying cosx = 0 The solution to this equation could not be determined.
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