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Simplifying 4cos(x) + -1cos(2x) + 3x = 0 Multiply cos * x 4cosx + -1cos(2x) + 3x = 0 Remove parenthesis around (2x) 4cosx + -1cos * 2x + 3x = 0 Reorder the terms for easier multiplication: 4cosx + -1 * 2cos * x + 3x = 0 Multiply -1 * 2 4cosx + -2cos * x + 3x = 0 Multiply cos * x 4cosx + -2cosx + 3x = 0 Combine like terms: 4cosx + -2cosx = 2cosx 2cosx + 3x = 0 Solving 2cosx + 3x = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-3x' to each side of the equation. 2cosx + 3x + -3x = 0 + -3x Combine like terms: 3x + -3x = 0 2cosx + 0 = 0 + -3x 2cosx = 0 + -3x Remove the zero: 2cosx = -3x Divide each side by '2osx'. c = -1.5o-1s-1 Simplifying c = -1.5o-1s-1
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