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Simplifying cosx + 1 = -1cosx Reorder the terms: 1 + cosx = -1cosx Solving 1 + cosx = -1cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add 'cosx' to each side of the equation. 1 + cosx + cosx = -1cosx + cosx Combine like terms: cosx + cosx = 2cosx 1 + 2cosx = -1cosx + cosx Combine like terms: -1cosx + cosx = 0 1 + 2cosx = 0 Add '-1' to each side of the equation. 1 + -1 + 2cosx = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 2cosx = 0 + -1 2cosx = 0 + -1 Combine like terms: 0 + -1 = -1 2cosx = -1 Divide each side by '2osx'. c = -0.5o-1s-1x-1 Simplifying c = -0.5o-1s-1x-1
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