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Simplifying f(x) = sin(x) * cos(2x) Multiply f * x fx = sin(x) * cos(2x) Remove parenthesis around (2x) fx = ins * x * cos * 2x Reorder the terms for easier multiplication: fx = 2ins * x * cos * x Multiply ins * x fx = 2insx * cos * x Multiply insx * cos fx = 2cinos2x * x Multiply cinos2x * x fx = 2cinos2x2 Solving fx = 2cinos2x2 Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Divide each side by 'x'. f = 2cinos2x Simplifying f = 2cinos2x
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