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Simplifying sin(4x) + sin(7x) = sin(11x) Remove parenthesis around (4x) ins * 4x + sin(7x) = sin(11x) Reorder the terms for easier multiplication: 4ins * x + sin(7x) = sin(11x) Multiply ins * x 4insx + sin(7x) = sin(11x) Remove parenthesis around (7x) 4insx + ins * 7x = sin(11x) Reorder the terms for easier multiplication: 4insx + 7ins * x = sin(11x) Multiply ins * x 4insx + 7insx = sin(11x) Combine like terms: 4insx + 7insx = 11insx 11insx = sin(11x) Remove parenthesis around (11x) 11insx = ins * 11x Reorder the terms for easier multiplication: 11insx = 11ins * x Multiply ins * x 11insx = 11insx Add '-11insx' to each side of the equation. 11insx + -11insx = 11insx + -11insx Combine like terms: 11insx + -11insx = 0 0 = 11insx + -11insx Combine like terms: 11insx + -11insx = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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