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Simplifying 3cos(x) + -3cos(2x) = 0 Multiply cos * x 3cosx + -3cos(2x) = 0 Remove parenthesis around (2x) 3cosx + -3cos * 2x = 0 Reorder the terms for easier multiplication: 3cosx + -3 * 2cos * x = 0 Multiply -3 * 2 3cosx + -6cos * x = 0 Multiply cos * x 3cosx + -6cosx = 0 Combine like terms: 3cosx + -6cosx = -3cosx -3cosx = 0 Solving -3cosx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Divide each side by '-3'. cosx = 0 Simplifying cosx = 0 The solution to this equation could not be determined.
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