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Simplifying f(x) = 7 + -6cos(2x) Multiply f * x fx = 7 + -6cos(2x) Remove parenthesis around (2x) fx = 7 + -6cos * 2x Reorder the terms for easier multiplication: fx = 7 + -6 * 2cos * x Multiply -6 * 2 fx = 7 + -12cos * x Multiply cos * x fx = 7 + -12cosx Solving fx = 7 + -12cosx Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Divide each side by 'x'. f = 7x-1 + -12cos Simplifying f = 7x-1 + -12cos Reorder the terms: f = -12cos + 7x-1
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