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Simplifying 2cos * 2x + -1 = cosx Reorder the terms for easier multiplication: 2 * 2cos * x + -1 = cosx Multiply 2 * 2 4cos * x + -1 = cosx Multiply cos * x 4cosx + -1 = cosx Reorder the terms: -1 + 4cosx = cosx Solving -1 + 4cosx = 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. -1 + 4cosx + -1cosx = cosx + -1cosx Combine like terms: 4cosx + -1cosx = 3cosx -1 + 3cosx = cosx + -1cosx Combine like terms: cosx + -1cosx = 0 -1 + 3cosx = 0 Add '1' to each side of the equation. -1 + 1 + 3cosx = 0 + 1 Combine like terms: -1 + 1 = 0 0 + 3cosx = 0 + 1 3cosx = 0 + 1 Combine like terms: 0 + 1 = 1 3cosx = 1 Divide each side by '3osx'. c = 0.3333333333o-1s-1x-1 Simplifying c = 0.3333333333o-1s-1x-1
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