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