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Simplifying 2cos(2x) + -1x + -1 = 0 Remove parenthesis around (2x) 2cos * 2x + -1x + -1 = 0 Reorder the terms for easier multiplication: 2 * 2cos * x + -1x + -1 = 0 Multiply 2 * 2 4cos * x + -1x + -1 = 0 Multiply cos * x 4cosx + -1x + -1 = 0 Reorder the terms: -1 + 4cosx + -1x = 0 Solving -1 + 4cosx + -1x = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 4cosx + 1 + -1x = 0 + 1 Reorder the terms: -1 + 1 + 4cosx + -1x = 0 + 1 Combine like terms: -1 + 1 = 0 0 + 4cosx + -1x = 0 + 1 4cosx + -1x = 0 + 1 Combine like terms: 0 + 1 = 1 4cosx + -1x = 1 Add 'x' to each side of the equation. 4cosx + -1x + x = 1 + x Combine like terms: -1x + x = 0 4cosx + 0 = 1 + x 4cosx = 1 + x Divide each side by '4osx'. c = 0.25o-1s-1x-1 + 0.25o-1s-1 Simplifying c = 0.25o-1s-1x-1 + 0.25o-1s-1 Reorder the terms: c = 0.25o-1s-1 + 0.25o-1s-1x-1
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