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Simplifying sin(x) + sin(4x) + sin(7x) = 0 Multiply ins * x insx + sin(4x) + sin(7x) = 0 Remove parenthesis around (4x) insx + ins * 4x + sin(7x) = 0 Reorder the terms for easier multiplication: insx + 4ins * x + sin(7x) = 0 Multiply ins * x insx + 4insx + sin(7x) = 0 Remove parenthesis around (7x) insx + 4insx + ins * 7x = 0 Reorder the terms for easier multiplication: insx + 4insx + 7ins * x = 0 Multiply ins * x insx + 4insx + 7insx = 0 Combine like terms: insx + 4insx = 5insx 5insx + 7insx = 0 Combine like terms: 5insx + 7insx = 12insx 12insx = 0 Solving 12insx = 0 Solving for variable 'i'. Move all terms containing i to the left, all other terms to the right. Divide each side by '12'. insx = 0 Simplifying insx = 0 The solution to this equation could not be determined.
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