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Simplifying 2 + -5cos2x + 1 = 0 Reorder the terms: 2 + 1 + -5cos2x = 0 Combine like terms: 2 + 1 = 3 3 + -5cos2x = 0 Solving 3 + -5cos2x = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -5cos2x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -5cos2x = 0 + -3 -5cos2x = 0 + -3 Combine like terms: 0 + -3 = -3 -5cos2x = -3 Divide each side by '-5os2x'. c = 0.6o-1s-2x-1 Simplifying c = 0.6o-1s-2x-1
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