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Simplifying 0 = 10cos(2x) Remove parenthesis around (2x) 0 = 10cos * 2x Reorder the terms for easier multiplication: 0 = 10 * 2cos * x Multiply 10 * 2 0 = 20cos * x Multiply cos * x 0 = 20cosx Solving 0 = 20cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-20cosx' to each side of the equation. 0 + -20cosx = 20cosx + -20cosx Remove the zero: -20cosx = 20cosx + -20cosx Combine like terms: 20cosx + -20cosx = 0 -20cosx = 0 Divide each side by '-20'. cosx = 0 Simplifying cosx = 0 The solution to this equation could not be determined.
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