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