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Simplifying 3cos(9x) + 3cos(9x) = 3 Remove parenthesis around (9x) 3cos * 9x + 3cos(9x) = 3 Reorder the terms for easier multiplication: 3 * 9cos * x + 3cos(9x) = 3 Multiply 3 * 9 27cos * x + 3cos(9x) = 3 Multiply cos * x 27cosx + 3cos(9x) = 3 Remove parenthesis around (9x) 27cosx + 3cos * 9x = 3 Reorder the terms for easier multiplication: 27cosx + 3 * 9cos * x = 3 Multiply 3 * 9 27cosx + 27cos * x = 3 Multiply cos * x 27cosx + 27cosx = 3 Combine like terms: 27cosx + 27cosx = 54cosx 54cosx = 3 Solving 54cosx = 3 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Divide each side by '54osx'. c = 0.05555555556o-1s-1x-1 Simplifying c = 0.05555555556o-1s-1x-1
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