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Simplifying cos(x) + -1 = 0.9 Multiply cos * x cosx + -1 = 0.9 Reorder the terms: -1 + cosx = 0.9 Solving -1 + cosx = 0.9 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 + 1 + cosx = 0.9 + 1 Combine like terms: -1 + 1 = 0 0 + cosx = 0.9 + 1 cosx = 0.9 + 1 Combine like terms: 0.9 + 1 = 1.9 cosx = 1.9 Divide each side by 'osx'. c = 1.9o-1s-1x-1 Simplifying c = 1.9o-1s-1x-1
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