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Simplifying sin(-8x) = -8sin(x) Remove parenthesis around (-8x) ins * -8x = -8sin(x) Reorder the terms for easier multiplication: -8ins * x = -8sin(x) Multiply ins * x -8insx = -8sin(x) Multiply ins * x -8insx = -8insx Add '8insx' to each side of the equation. -8insx + 8insx = -8insx + 8insx Combine like terms: -8insx + 8insx = 0 0 = -8insx + 8insx Combine like terms: -8insx + 8insx = 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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