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Simplifying 2cos2(X) + -1cos(X) = 1 Multiply cos2 * X 2cos2X + -1cos(X) = 1 Multiply cos * X 2cos2X + -1cosX = 1 Reorder the terms: -1cosX + 2cos2X = 1 Solving -1cosX + 2cos2X = 1 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Reorder the terms: -1 + -1cosX + 2cos2X = 1 + -1 Combine like terms: 1 + -1 = 0 -1 + -1cosX + 2cos2X = 0 The solution to this equation could not be determined.
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