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Simplifying sen(2x) = 2sen(x) Remove parenthesis around (2x) ens * 2x = 2sen(x) Reorder the terms for easier multiplication: 2ens * x = 2sen(x) Multiply ens * x 2ensx = 2sen(x) Multiply ens * x 2ensx = 2ensx Add '-2ensx' to each side of the equation. 2ensx + -2ensx = 2ensx + -2ensx Combine like terms: 2ensx + -2ensx = 0 0 = 2ensx + -2ensx Combine like terms: 2ensx + -2ensx = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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