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Simplifying sin(2x) * cos(5x) = sin(5x) * cos(2x) Remove parenthesis around (2x) ins * 2x * cos(5x) = sin(5x) * cos(2x) Remove parenthesis around (5x) ins * 2x * cos * 5x = sin(5x) * cos(2x) Reorder the terms for easier multiplication: 2 * 5ins * x * cos * x = sin(5x) * cos(2x) Multiply 2 * 5 10ins * x * cos * x = sin(5x) * cos(2x) Multiply ins * x 10insx * cos * x = sin(5x) * cos(2x) Multiply insx * cos 10cinos2x * x = sin(5x) * cos(2x) Multiply cinos2x * x 10cinos2x2 = sin(5x) * cos(2x) Remove parenthesis around (5x) 10cinos2x2 = ins * 5x * cos(2x) Remove parenthesis around (2x) 10cinos2x2 = ins * 5x * cos * 2x Reorder the terms for easier multiplication: 10cinos2x2 = 5 * 2ins * x * cos * x Multiply 5 * 2 10cinos2x2 = 10ins * x * cos * x Multiply ins * x 10cinos2x2 = 10insx * cos * x Multiply insx * cos 10cinos2x2 = 10cinos2x * x Multiply cinos2x * x 10cinos2x2 = 10cinos2x2 Add '-10cinos2x2' to each side of the equation. 10cinos2x2 + -10cinos2x2 = 10cinos2x2 + -10cinos2x2 Combine like terms: 10cinos2x2 + -10cinos2x2 = 0 0 = 10cinos2x2 + -10cinos2x2 Combine like terms: 10cinos2x2 + -10cinos2x2 = 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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