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Simplifying (9x)(cos(x)) + -9 = 0 Remove parenthesis around (9x) 9x(cos(x)) + -9 = 0 Multiply cos * x 9x(cosx) + -9 = 0 Multiply x * cosx 9cosx2 + -9 = 0 Reorder the terms: -9 + 9cosx2 = 0 Solving -9 + 9cosx2 = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + 9cosx2 = 0 + 9 Combine like terms: -9 + 9 = 0 0 + 9cosx2 = 0 + 9 9cosx2 = 0 + 9 Combine like terms: 0 + 9 = 9 9cosx2 = 9 Divide each side by '9osx2'. c = o-1s-1x-2 Simplifying c = o-1s-1x-2
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