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