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