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