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Simplifying 4cos(7x) = 4 + -4cos(7x) Remove parenthesis around (7x) 4cos * 7x = 4 + -4cos(7x) Reorder the terms for easier multiplication: 4 * 7cos * x = 4 + -4cos(7x) Multiply 4 * 7 28cos * x = 4 + -4cos(7x) Multiply cos * x 28cosx = 4 + -4cos(7x) Remove parenthesis around (7x) 28cosx = 4 + -4cos * 7x Reorder the terms for easier multiplication: 28cosx = 4 + -4 * 7cos * x Multiply -4 * 7 28cosx = 4 + -28cos * x Multiply cos * x 28cosx = 4 + -28cosx Solving 28cosx = 4 + -28cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '28cosx' to each side of the equation. 28cosx + 28cosx = 4 + -28cosx + 28cosx Combine like terms: 28cosx + 28cosx = 56cosx 56cosx = 4 + -28cosx + 28cosx Combine like terms: -28cosx + 28cosx = 0 56cosx = 4 + 0 56cosx = 4 Divide each side by '56osx'. c = 0.07142857143o-1s-1x-1 Simplifying c = 0.07142857143o-1s-1x-1
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