\textbf{111-} What is $\displaystyle\lim_{x\to 0}\dfrac{\cos^2 x - \sqrt{\cos x}}{x^2}$?
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(1) $-\dfrac{3}{2}$ \hfill (2) $-\dfrac{3}{4}$ \hfill (3) $-\dfrac{1}{4}$ \hfill (4) $\dfrac{3}{2}$
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\textbf{Mathematics} \hfill \textbf{120-C} \hfill \textbf{Page 3}
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