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Simplifying sin(4x) * cos(7x) + cos(7x) * sin(4x) = 0 Remove parenthesis around (4x) ins * 4x * cos(7x) + cos(7x) * sin(4x) = 0 Remove parenthesis around (7x) ins * 4x * cos * 7x + cos(7x) * sin(4x) = 0 Reorder the terms for easier multiplication: 4 * 7ins * x * cos * x + cos(7x) * sin(4x) = 0 Multiply 4 * 7 28ins * x * cos * x + cos(7x) * sin(4x) = 0 Multiply ins * x 28insx * cos * x + cos(7x) * sin(4x) = 0 Multiply insx * cos 28cinos2x * x + cos(7x) * sin(4x) = 0 Multiply cinos2x * x 28cinos2x2 + cos(7x) * sin(4x) = 0 Remove parenthesis around (7x) 28cinos2x2 + cos * 7x * sin(4x) = 0 Remove parenthesis around (4x) 28cinos2x2 + cos * 7x * ins * 4x = 0 Reorder the terms for easier multiplication: 28cinos2x2 + 7 * 4cos * x * ins * x = 0 Multiply 7 * 4 28cinos2x2 + 28cos * x * ins * x = 0 Multiply cos * x 28cinos2x2 + 28cosx * ins * x = 0 Multiply cosx * ins 28cinos2x2 + 28cinos2x * x = 0 Multiply cinos2x * x 28cinos2x2 + 28cinos2x2 = 0 Combine like terms: 28cinos2x2 + 28cinos2x2 = 56cinos2x2 56cinos2x2 = 0 Solving 56cinos2x2 = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Divide each side by '56'. cinos2x2 = 0 Simplifying cinos2x2 = 0 The solution to this equation could not be determined.
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