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Simplifying cos2(2x) + -1cos2(4x) = 0 Remove parenthesis around (2x) cos2 * 2x + -1cos2(4x) = 0 Reorder the terms for easier multiplication: 2cos2 * x + -1cos2(4x) = 0 Multiply cos2 * x 2cos2x + -1cos2(4x) = 0 Remove parenthesis around (4x) 2cos2x + -1cos2 * 4x = 0 Reorder the terms for easier multiplication: 2cos2x + -1 * 4cos2 * x = 0 Multiply -1 * 4 2cos2x + -4cos2 * x = 0 Multiply cos2 * x 2cos2x + -4cos2x = 0 Combine like terms: 2cos2x + -4cos2x = -2cos2x -2cos2x = 0 Solving -2cos2x = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Divide each side by '-2'. cos2x = 0 Simplifying cos2x = 0 The solution to this equation could not be determined.
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