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Simplifying 2cos(2x) = 4cosx + -3 Remove parenthesis around (2x) 2cos * 2x = 4cosx + -3 Reorder the terms for easier multiplication: 2 * 2cos * x = 4cosx + -3 Multiply 2 * 2 4cos * x = 4cosx + -3 Multiply cos * x 4cosx = 4cosx + -3 Reorder the terms: 4cosx = -3 + 4cosx Add '-4cosx' to each side of the equation. 4cosx + -4cosx = -3 + 4cosx + -4cosx Combine like terms: 4cosx + -4cosx = 0 0 = -3 + 4cosx + -4cosx Combine like terms: 4cosx + -4cosx = 0 0 = -3 + 0 0 = -3 Solving 0 = -3 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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