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Simplifying 6cos(2x) = -18cos(x) + -12 Remove parenthesis around (2x) 6cos * 2x = -18cos(x) + -12 Reorder the terms for easier multiplication: 6 * 2cos * x = -18cos(x) + -12 Multiply 6 * 2 12cos * x = -18cos(x) + -12 Multiply cos * x 12cosx = -18cos(x) + -12 Multiply cos * x 12cosx = -18cosx + -12 Reorder the terms: 12cosx = -12 + -18cosx Solving 12cosx = -12 + -18cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '18cosx' to each side of the equation. 12cosx + 18cosx = -12 + -18cosx + 18cosx Combine like terms: 12cosx + 18cosx = 30cosx 30cosx = -12 + -18cosx + 18cosx Combine like terms: -18cosx + 18cosx = 0 30cosx = -12 + 0 30cosx = -12 Divide each side by '30osx'. c = -0.4o-1s-1x-1 Simplifying c = -0.4o-1s-1x-1
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