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Simplifying 0 = 2cosx + cos(4x) Remove parenthesis around (4x) 0 = 2cosx + cos * 4x Reorder the terms for easier multiplication: 0 = 2cosx + 4cos * x Multiply cos * x 0 = 2cosx + 4cosx Combine like terms: 2cosx + 4cosx = 6cosx 0 = 6cosx Solving 0 = 6cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-6cosx' to each side of the equation. 0 + -6cosx = 6cosx + -6cosx Remove the zero: -6cosx = 6cosx + -6cosx Combine like terms: 6cosx + -6cosx = 0 -6cosx = 0 Divide each side by '-6'. cosx = 0 Simplifying cosx = 0 The solution to this equation could not be determined.
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