Plugging in 0 into the expression, we get \( \frac{1 - \cos(0)}{\cos^2(0) - 3\cos(0) + 2} \), which simplifies to \( \frac{1 - 1}{1 - 3 + 2} \), or \( \frac{0}{0} \). This is an indeterminate form, so we need to manipulate the expression to find the limit.
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