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Simplifying 7cos(2x) = 7 + -7cos(2x) Remove parenthesis around (2x) 7cos * 2x = 7 + -7cos(2x) Reorder the terms for easier multiplication: 7 * 2cos * x = 7 + -7cos(2x) Multiply 7 * 2 14cos * x = 7 + -7cos(2x) Multiply cos * x 14cosx = 7 + -7cos(2x) Remove parenthesis around (2x) 14cosx = 7 + -7cos * 2x Reorder the terms for easier multiplication: 14cosx = 7 + -7 * 2cos * x Multiply -7 * 2 14cosx = 7 + -14cos * x Multiply cos * x 14cosx = 7 + -14cosx Solving 14cosx = 7 + -14cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '14cosx' to each side of the equation. 14cosx + 14cosx = 7 + -14cosx + 14cosx Combine like terms: 14cosx + 14cosx = 28cosx 28cosx = 7 + -14cosx + 14cosx Combine like terms: -14cosx + 14cosx = 0 28cosx = 7 + 0 28cosx = 7 Divide each side by '28osx'. c = 0.25o-1s-1x-1 Simplifying c = 0.25o-1s-1x-1
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