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Simplifying 7cos(2x) = 7cosx Remove parenthesis around (2x) 7cos * 2x = 7cosx Reorder the terms for easier multiplication: 7 * 2cos * x = 7cosx Multiply 7 * 2 14cos * x = 7cosx Multiply cos * x 14cosx = 7cosx Solving 14cosx = 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. 14cosx + -7cosx = 7cosx + -7cosx Combine like terms: 14cosx + -7cosx = 7cosx 7cosx = 7cosx + -7cosx Combine like terms: 7cosx + -7cosx = 0 7cosx = 0 Divide each side by '7'. cosx = 0 Simplifying cosx = 0 The solution to this equation could not be determined.
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