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Simplifying 2cos(2x) + cos(6x) = 0 Remove parenthesis around (2x) 2cos * 2x + cos(6x) = 0 Reorder the terms for easier multiplication: 2 * 2cos * x + cos(6x) = 0 Multiply 2 * 2 4cos * x + cos(6x) = 0 Multiply cos * x 4cosx + cos(6x) = 0 Remove parenthesis around (6x) 4cosx + cos * 6x = 0 Reorder the terms for easier multiplication: 4cosx + 6cos * x = 0 Multiply cos * x 4cosx + 6cosx = 0 Combine like terms: 4cosx + 6cosx = 10cosx 10cosx = 0 Solving 10cosx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Divide each side by '10'. cosx = 0.0 Simplifying cosx = 0.0 The solution to this equation could not be determined.
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