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Simplifying 2cos(2x + 60) + -1 = 0 Reorder the terms: 2cos(60 + 2x) + -1 = 0 (60 * 2cos + 2x * 2cos) + -1 = 0 (120cos + 4cosx) + -1 = 0 Reorder the terms: -1 + 120cos + 4cosx = 0 Solving -1 + 120cos + 4cosx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 120cos + 1 + 4cosx = 0 + 1 Reorder the terms: -1 + 1 + 120cos + 4cosx = 0 + 1 Combine like terms: -1 + 1 = 0 0 + 120cos + 4cosx = 0 + 1 120cos + 4cosx = 0 + 1 Combine like terms: 0 + 1 = 1 120cos + 4cosx = 1 Reorder the terms: -1 + 120cos + 4cosx = 1 + -1 Combine like terms: 1 + -1 = 0 -1 + 120cos + 4cosx = 0 The solution to this equation could not be determined.
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