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Simplifying Cos(2x) = 2cos2x + -1 Remove parenthesis around (2x) osC * 2x = 2cos2x + -1 Reorder the terms for easier multiplication: 2osC * x = 2cos2x + -1 Multiply osC * x 2osxC = 2cos2x + -1 Reorder the terms: 2osxC = -1 + 2cos2x Solving 2osxC = -1 + 2cos2x Solving for variable 'o'. Move all terms containing o to the left, all other terms to the right. Add '-2cos2x' to each side of the equation. -2cos2x + 2osxC = -1 + 2cos2x + -2cos2x Combine like terms: 2cos2x + -2cos2x = 0 -2cos2x + 2osxC = -1 + 0 -2cos2x + 2osxC = -1 Reorder the terms: 1 + -2cos2x + 2osxC = -1 + 1 Combine like terms: -1 + 1 = 0 1 + -2cos2x + 2osxC = 0 The solution to this equation could not be determined.
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