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Simplifying -1cos(2X) = cosX Remove parenthesis around (2X) -1cos * 2X = cosX Reorder the terms for easier multiplication: -1 * 2cos * X = cosX Multiply -1 * 2 -2cos * X = cosX Multiply cos * X -2cosX = cosX Solving -2cosX = cosX Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-1cosX' to each side of the equation. -2cosX + -1cosX = cosX + -1cosX Combine like terms: -2cosX + -1cosX = -3cosX -3cosX = cosX + -1cosX Combine like terms: cosX + -1cosX = 0 -3cosX = 0 Divide each side by '-3'. cosX = 0 Simplifying cosX = 0 The solution to this equation could not be determined.
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