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Simplifying 4cos(3x) + 4 = 0 Remove parenthesis around (3x) 4cos * 3x + 4 = 0 Reorder the terms for easier multiplication: 4 * 3cos * x + 4 = 0 Multiply 4 * 3 12cos * x + 4 = 0 Multiply cos * x 12cosx + 4 = 0 Reorder the terms: 4 + 12cosx = 0 Solving 4 + 12cosx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + 12cosx = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 12cosx = 0 + -4 12cosx = 0 + -4 Combine like terms: 0 + -4 = -4 12cosx = -4 Divide each side by '12osx'. c = -0.3333333333o-1s-1x-1 Simplifying c = -0.3333333333o-1s-1x-1
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