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Simplifying 1 + cos(6x) = 3cos(2x) Remove parenthesis around (6x) 1 + cos * 6x = 3cos(2x) Reorder the terms for easier multiplication: 1 + 6cos * x = 3cos(2x) Multiply cos * x 1 + 6cosx = 3cos(2x) Remove parenthesis around (2x) 1 + 6cosx = 3cos * 2x Reorder the terms for easier multiplication: 1 + 6cosx = 3 * 2cos * x Multiply 3 * 2 1 + 6cosx = 6cos * x Multiply cos * x 1 + 6cosx = 6cosx Add '-6cosx' to each side of the equation. 1 + 6cosx + -6cosx = 6cosx + -6cosx Combine like terms: 6cosx + -6cosx = 0 1 + 0 = 6cosx + -6cosx 1 = 6cosx + -6cosx Combine like terms: 6cosx + -6cosx = 0 1 = 0 Solving 1 = 0 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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