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Simplifying cos(5x) + 5cos(3x) + 12cos(x) = 0 Remove parenthesis around (5x) cos * 5x + 5cos(3x) + 12cos(x) = 0 Reorder the terms for easier multiplication: 5cos * x + 5cos(3x) + 12cos(x) = 0 Multiply cos * x 5cosx + 5cos(3x) + 12cos(x) = 0 Remove parenthesis around (3x) 5cosx + 5cos * 3x + 12cos(x) = 0 Reorder the terms for easier multiplication: 5cosx + 5 * 3cos * x + 12cos(x) = 0 Multiply 5 * 3 5cosx + 15cos * x + 12cos(x) = 0 Multiply cos * x 5cosx + 15cosx + 12cos(x) = 0 Multiply cos * x 5cosx + 15cosx + 12cosx = 0 Combine like terms: 5cosx + 15cosx = 20cosx 20cosx + 12cosx = 0 Combine like terms: 20cosx + 12cosx = 32cosx 32cosx = 0 Solving 32cosx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Divide each side by '32'. cosx = 0 Simplifying cosx = 0 The solution to this equation could not be determined.
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