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Simplifying f(x) = sen(2x) * cos(x) Multiply f * x fx = sen(2x) * cos(x) Remove parenthesis around (2x) fx = ens * 2x * cos(x) Reorder the terms for easier multiplication: fx = 2ens * x * cos * x Multiply ens * x fx = 2ensx * cos * x Multiply ensx * cos fx = 2cenos2x * x Multiply cenos2x * x fx = 2cenos2x2 Solving fx = 2cenos2x2 Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Divide each side by 'x'. f = 2cenos2x Simplifying f = 2cenos2x
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