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Simplifying 0 = 7cos(7x) Remove parenthesis around (7x) 0 = 7cos * 7x Reorder the terms for easier multiplication: 0 = 7 * 7cos * x Multiply 7 * 7 0 = 49cos * x Multiply cos * x 0 = 49cosx Solving 0 = 49cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-49cosx' to each side of the equation. 0 + -49cosx = 49cosx + -49cosx Remove the zero: -49cosx = 49cosx + -49cosx Combine like terms: 49cosx + -49cosx = 0 -49cosx = 0 Divide each side by '-49'. cosx = 0 Simplifying cosx = 0 The solution to this equation could not be determined.
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