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Simplifying 0 = 2cos(13x) + -1 Remove parenthesis around (13x) 0 = 2cos * 13x + -1 Reorder the terms for easier multiplication: 0 = 2 * 13cos * x + -1 Multiply 2 * 13 0 = 26cos * x + -1 Multiply cos * x 0 = 26cosx + -1 Reorder the terms: 0 = -1 + 26cosx Solving 0 = -1 + 26cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-26cosx' to each side of the equation. 0 + -26cosx = -1 + 26cosx + -26cosx Remove the zero: -26cosx = -1 + 26cosx + -26cosx Combine like terms: 26cosx + -26cosx = 0 -26cosx = -1 + 0 -26cosx = -1 Divide each side by '-26osx'. c = 0.03846153846o-1s-1x-1 Simplifying c = 0.03846153846o-1s-1x-1
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