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Simplifying sin(8x) = 4sin(2x) Remove parenthesis around (8x) ins * 8x = 4sin(2x) Reorder the terms for easier multiplication: 8ins * x = 4sin(2x) Multiply ins * x 8insx = 4sin(2x) Remove parenthesis around (2x) 8insx = 4ins * 2x Reorder the terms for easier multiplication: 8insx = 4 * 2ins * x Multiply 4 * 2 8insx = 8ins * 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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