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Simplifying cos(2x) = 3cosx + 4 Remove parenthesis around (2x) cos * 2x = 3cosx + 4 Reorder the terms for easier multiplication: 2cos * x = 3cosx + 4 Multiply cos * x 2cosx = 3cosx + 4 Reorder the terms: 2cosx = 4 + 3cosx Solving 2cosx = 4 + 3cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-3cosx' to each side of the equation. 2cosx + -3cosx = 4 + 3cosx + -3cosx Combine like terms: 2cosx + -3cosx = -1cosx -1cosx = 4 + 3cosx + -3cosx Combine like terms: 3cosx + -3cosx = 0 -1cosx = 4 + 0 -1cosx = 4 Divide each side by '-1osx'. c = -4o-1s-1x-1 Simplifying c = -4o-1s-1x-1
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