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Simplifying 3cos(3x) + -2 = 0 Remove parenthesis around (3x) 3cos * 3x + -2 = 0 Reorder the terms for easier multiplication: 3 * 3cos * x + -2 = 0 Multiply 3 * 3 9cos * x + -2 = 0 Multiply cos * x 9cosx + -2 = 0 Reorder the terms: -2 + 9cosx = 0 Solving -2 + 9cosx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + 9cosx = 0 + 2 Combine like terms: -2 + 2 = 0 0 + 9cosx = 0 + 2 9cosx = 0 + 2 Combine like terms: 0 + 2 = 2 9cosx = 2 Divide each side by '9osx'. c = 0.2222222222o-1s-1x-1 Simplifying c = 0.2222222222o-1s-1x-1
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