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Simplifying sin(7x) * cos(4x) + sin(x) + -1cos(7x) * sin(4x) + cos(x) = 0 Remove parenthesis around (7x) ins * 7x * cos(4x) + sin(x) + -1cos(7x) * sin(4x) + cos(x) = 0 Remove parenthesis around (4x) ins * 7x * cos * 4x + sin(x) + -1cos(7x) * sin(4x) + cos(x) = 0 Reorder the terms for easier multiplication: 7 * 4ins * x * cos * x + sin(x) + -1cos(7x) * sin(4x) + cos(x) = 0 Multiply 7 * 4 28ins * x * cos * x + sin(x) + -1cos(7x) * sin(4x) + cos(x) = 0 Multiply ins * x 28insx * cos * x + sin(x) + -1cos(7x) * sin(4x) + cos(x) = 0 Multiply insx * cos 28cinos2x * x + sin(x) + -1cos(7x) * sin(4x) + cos(x) = 0 Multiply cinos2x * x 28cinos2x2 + sin(x) + -1cos(7x) * sin(4x) + cos(x) = 0 Multiply ins * x 28cinos2x2 + insx + -1cos(7x) * sin(4x) + cos(x) = 0 Remove parenthesis around (7x) 28cinos2x2 + insx + -1cos * 7x * sin(4x) + cos(x) = 0 Remove parenthesis around (4x) 28cinos2x2 + insx + -1cos * 7x * ins * 4x + cos(x) = 0 Reorder the terms for easier multiplication: 28cinos2x2 + insx + -1 * 7 * 4cos * x * ins * x + cos(x) = 0 Multiply -1 * 7 28cinos2x2 + insx + -7 * 4cos * x * ins * x + cos(x) = 0 Multiply -7 * 4 28cinos2x2 + insx + -28cos * x * ins * x + cos(x) = 0 Multiply cos * x 28cinos2x2 + insx + -28cosx * ins * x + cos(x) = 0 Multiply cosx * ins 28cinos2x2 + insx + -28cinos2x * x + cos(x) = 0 Multiply cinos2x * x 28cinos2x2 + insx + -28cinos2x2 + cos(x) = 0 Multiply cos * x 28cinos2x2 + insx + -28cinos2x2 + cosx = 0 Reorder the terms: 28cinos2x2 + -28cinos2x2 + cosx + insx = 0 Combine like terms: 28cinos2x2 + -28cinos2x2 = 0 0 + cosx + insx = 0 cosx + insx = 0 Solving cosx + insx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-1insx' to each side of the equation. cosx + insx + -1insx = 0 + -1insx Combine like terms: insx + -1insx = 0 cosx + 0 = 0 + -1insx cosx = 0 + -1insx Remove the zero: cosx = -1insx Divide each side by 'osx'. c = -1ino-1 Simplifying c = -1ino-1
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