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Simplifying 2(cos(2x) + -1cos(x)) = 0 Remove parenthesis around (2x) 2(cos * 2x + -1cos(x)) = 0 Reorder the terms for easier multiplication: 2(2cos * x + -1cos(x)) = 0 Multiply cos * x 2(2cosx + -1cos(x)) = 0 Multiply cos * x 2(2cosx + -1cosx) = 0 Combine like terms: 2cosx + -1cosx = 1cosx 2(1cosx) = 0 Remove parenthesis around (1cosx) 2 * 1cosx = 0 Multiply 2 * 1 2cosx = 0 Solving 2cosx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Divide each side by '2'. cosx = 0 Simplifying cosx = 0 The solution to this equation could not be determined.
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