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Simplifying 3cos(2x) = cosx + 2 Remove parenthesis around (2x) 3cos * 2x = cosx + 2 Reorder the terms for easier multiplication: 3 * 2cos * x = cosx + 2 Multiply 3 * 2 6cos * x = cosx + 2 Multiply cos * x 6cosx = cosx + 2 Reorder the terms: 6cosx = 2 + cosx Solving 6cosx = 2 + cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-1cosx' to each side of the equation. 6cosx + -1cosx = 2 + cosx + -1cosx Combine like terms: 6cosx + -1cosx = 5cosx 5cosx = 2 + cosx + -1cosx Combine like terms: cosx + -1cosx = 0 5cosx = 2 + 0 5cosx = 2 Divide each side by '5osx'. c = 0.4o-1s-1x-1 Simplifying c = 0.4o-1s-1x-1
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