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Simplifying 0 = 7cos(-1x) Remove parenthesis around (-1x) 0 = 7cos * -1x Reorder the terms for easier multiplication: 0 = 7 * -1cos * x Multiply 7 * -1 0 = -7cos * x Multiply cos * x 0 = -7cosx Solving 0 = -7cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '7cosx' to each side of the equation. 0 + 7cosx = -7cosx + 7cosx Remove the zero: 7cosx = -7cosx + 7cosx Combine like terms: -7cosx + 7cosx = 0 7cosx = 0 Divide each side by '7'. cosx = 0 Simplifying cosx = 0 The solution to this equation could not be determined.
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