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Simplifying f(x) = 10cos(12x) + 4 Multiply f * x fx = 10cos(12x) + 4 Remove parenthesis around (12x) fx = 10cos * 12x + 4 Reorder the terms for easier multiplication: fx = 10 * 12cos * x + 4 Multiply 10 * 12 fx = 120cos * x + 4 Multiply cos * x fx = 120cosx + 4 Reorder the terms: fx = 4 + 120cosx Solving fx = 4 + 120cosx Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Divide each side by 'x'. f = 4x-1 + 120cos Simplifying f = 4x-1 + 120cos Reorder the terms: f = 120cos + 4x-1
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