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Simplifying 8 = 9cos(2x) Remove parenthesis around (2x) 8 = 9cos * 2x Reorder the terms for easier multiplication: 8 = 9 * 2cos * x Multiply 9 * 2 8 = 18cos * x Multiply cos * x 8 = 18cosx Solving 8 = 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. 8 + -18cosx = 18cosx + -18cosx Combine like terms: 18cosx + -18cosx = 0 8 + -18cosx = 0 Add '-8' to each side of the equation. 8 + -8 + -18cosx = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -18cosx = 0 + -8 -18cosx = 0 + -8 Combine like terms: 0 + -8 = -8 -18cosx = -8 Divide each side by '-18osx'. c = 0.4444444444o-1s-1x-1 Simplifying c = 0.4444444444o-1s-1x-1
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