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Simplifying 7cos(9x) + -2 = 0 Remove parenthesis around (9x) 7cos * 9x + -2 = 0 Reorder the terms for easier multiplication: 7 * 9cos * x + -2 = 0 Multiply 7 * 9 63cos * x + -2 = 0 Multiply cos * x 63cosx + -2 = 0 Reorder the terms: -2 + 63cosx = 0 Solving -2 + 63cosx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + 63cosx = 0 + 2 Combine like terms: -2 + 2 = 0 0 + 63cosx = 0 + 2 63cosx = 0 + 2 Combine like terms: 0 + 2 = 2 63cosx = 2 Divide each side by '63osx'. c = 0.03174603175o-1s-1x-1 Simplifying c = 0.03174603175o-1s-1x-1
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