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Simplifying cos(4x) = cos(x) Remove parenthesis around (4x) cos * 4x = cos(x) Reorder the terms for easier multiplication: 4cos * x = cos(x) Multiply cos * x 4cosx = cos(x) Multiply cos * x 4cosx = cosx Solving 4cosx = 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. 4cosx + -1cosx = cosx + -1cosx Combine like terms: 4cosx + -1cosx = 3cosx 3cosx = cosx + -1cosx Combine like terms: cosx + -1cosx = 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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