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