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Simplifying cos(3x) = cosx Remove parenthesis around (3x) cos * 3x = cosx Reorder the terms for easier multiplication: 3cos * x = cosx Multiply cos * x 3cosx = cosx Solving 3cosx = 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. 3cosx + -1cosx = cosx + -1cosx Combine like terms: 3cosx + -1cosx = 2cosx 2cosx = cosx + -1cosx Combine like terms: cosx + -1cosx = 0 2cosx = 0 Divide each side by '2'. cosx = 0 Simplifying cosx = 0 The solution to this equation could not be determined.
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