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Simplifying 0 = 4cos(2x) Remove parenthesis around (2x) 0 = 4cos * 2x Reorder the terms for easier multiplication: 0 = 4 * 2cos * x Multiply 4 * 2 0 = 8cos * x Multiply cos * x 0 = 8cosx Solving 0 = 8cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-8cosx' to each side of the equation. 0 + -8cosx = 8cosx + -8cosx Remove the zero: -8cosx = 8cosx + -8cosx Combine like terms: 8cosx + -8cosx = 0 -8cosx = 0 Divide each side by '-8'. cosx = 0 Simplifying cosx = 0 The solution to this equation could not be determined.
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