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Simplifying sin(5x) + sin(9x) + -1cos(2x) = 0 Remove parenthesis around (5x) ins * 5x + sin(9x) + -1cos(2x) = 0 Reorder the terms for easier multiplication: 5ins * x + sin(9x) + -1cos(2x) = 0 Multiply ins * x 5insx + sin(9x) + -1cos(2x) = 0 Remove parenthesis around (9x) 5insx + ins * 9x + -1cos(2x) = 0 Reorder the terms for easier multiplication: 5insx + 9ins * x + -1cos(2x) = 0 Multiply ins * x 5insx + 9insx + -1cos(2x) = 0 Remove parenthesis around (2x) 5insx + 9insx + -1cos * 2x = 0 Reorder the terms for easier multiplication: 5insx + 9insx + -1 * 2cos * x = 0 Multiply -1 * 2 5insx + 9insx + -2cos * x = 0 Multiply cos * x 5insx + 9insx + -2cosx = 0 Reorder the terms: -2cosx + 5insx + 9insx = 0 Combine like terms: 5insx + 9insx = 14insx -2cosx + 14insx = 0 Solving -2cosx + 14insx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-14insx' to each side of the equation. -2cosx + 14insx + -14insx = 0 + -14insx Combine like terms: 14insx + -14insx = 0 -2cosx + 0 = 0 + -14insx -2cosx = 0 + -14insx Remove the zero: -2cosx = -14insx Divide each side by '-2osx'. c = 7ino-1 Simplifying c = 7ino-1
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