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Simplifying sin(2x) * cos(6x) + -1cos(2x) * sin(6x) = -0.4 Remove parenthesis around (2x) ins * 2x * cos(6x) + -1cos(2x) * sin(6x) = -0.4 Remove parenthesis around (6x) ins * 2x * cos * 6x + -1cos(2x) * sin(6x) = -0.4 Reorder the terms for easier multiplication: 2 * 6ins * x * cos * x + -1cos(2x) * sin(6x) = -0.4 Multiply 2 * 6 12ins * x * cos * x + -1cos(2x) * sin(6x) = -0.4 Multiply ins * x 12insx * cos * x + -1cos(2x) * sin(6x) = -0.4 Multiply insx * cos 12cinos2x * x + -1cos(2x) * sin(6x) = -0.4 Multiply cinos2x * x 12cinos2x2 + -1cos(2x) * sin(6x) = -0.4 Remove parenthesis around (2x) 12cinos2x2 + -1cos * 2x * sin(6x) = -0.4 Remove parenthesis around (6x) 12cinos2x2 + -1cos * 2x * ins * 6x = -0.4 Reorder the terms for easier multiplication: 12cinos2x2 + -1 * 2 * 6cos * x * ins * x = -0.4 Multiply -1 * 2 12cinos2x2 + -2 * 6cos * x * ins * x = -0.4 Multiply -2 * 6 12cinos2x2 + -12cos * x * ins * x = -0.4 Multiply cos * x 12cinos2x2 + -12cosx * ins * x = -0.4 Multiply cosx * ins 12cinos2x2 + -12cinos2x * x = -0.4 Multiply cinos2x * x 12cinos2x2 + -12cinos2x2 = -0.4 Combine like terms: 12cinos2x2 + -12cinos2x2 = 0 0 = -0.4 Solving 0 = -0.4 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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