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Simplifying 2cos2x + -3cos2x + -2 = 0 Reorder the terms: -2 + 2cos2x + -3cos2x = 0 Combine like terms: 2cos2x + -3cos2x = -1cos2x -2 + -1cos2x = 0 Solving -2 + -1cos2x = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -1cos2x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1cos2x = 0 + 2 -1cos2x = 0 + 2 Combine like terms: 0 + 2 = 2 -1cos2x = 2 Divide each side by '-1os2x'. c = -2o-1s-2x-1 Simplifying c = -2o-1s-2x-1
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