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Simplifying tan(2x) * cos(2x) = sen(2x) Remove parenthesis around (2x) ant * 2x * cos(2x) = sen(2x) Remove parenthesis around (2x) ant * 2x * cos * 2x = sen(2x) Reorder the terms for easier multiplication: 2 * 2ant * x * cos * x = sen(2x) Multiply 2 * 2 4ant * x * cos * x = sen(2x) Multiply ant * x 4antx * cos * x = sen(2x) Multiply antx * cos 4acnostx * x = sen(2x) Multiply acnostx * x 4acnostx^{2}= sen(2x) Remove parenthesis around (2x) 4acnostx^{2}= ens * 2x Reorder the terms for easier multiplication: 4acnostx^{2}= 2ens * x Multiply ens * x 4acnostx^{2}= 2ensx Solving 4acnostx^{2}= 2ensx Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Divide each side by '4cnostx^{2}'. a = 0.5c^{-1}eo^{-1}t^{-1}x^{-1}Simplifying a = 0.5c^{-1}eo^{-1}t^{-1}x^{-1}

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