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Simplifying 4cos(2x) = cos(x) Remove parenthesis around (2x) 4cos * 2x = cos(x) Reorder the terms for easier multiplication: 4 * 2cos * x = cos(x) Multiply 4 * 2 8cos * x = cos(x) Multiply cos * x 8cosx = cos(x) Multiply cos * x 8cosx = cosx Solving 8cosx = cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-1cosx' to each side of the equation. 8cosx + -1cosx = cosx + -1cosx Combine like terms: 8cosx + -1cosx = 7cosx 7cosx = cosx + -1cosx Combine like terms: cosx + -1cosx = 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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