\( \lim _{x \rightarrow \pi / 4} \frac{\sqrt{2} \cos x-1}{\cot x-1}= \)
\( \mathrm{P} \)
(1) \( ...
\( \lim _{x \rightarrow \pi / 4} \frac{\sqrt{2} \cos x-1}{\cot x-1}= \)
\( \mathrm{P} \)
(1) \( \frac{1}{\sqrt{2}} \).
(2) \( \frac{1}{2} \)
(3) \( \frac{1}{2 \sqrt{2}} \)
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