The complete solution set of the inequality \( \tan ^{2} x-2 \sqrt{2} \tan x+1 \leq 0 \) is....

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The complete solution set of the inequality
\( \mathrm{P} \)
\( \tan ^{2} x-2 \sqrt{2} \tan x+1 \leq 0 \) is
W
(1) \( n \pi+\frac{\pi}{8} \leq x \leq \frac{3 \pi}{8}+n \pi, n \in I \)
(2) \( n \pi+\frac{\pi}{4} \leq x \leq \frac{3 \pi}{4}+n \pi, n \in I \)
(3) \( n \pi+\frac{\pi}{16} \leq x \leq \frac{3 \pi}{8}+n \pi \in I \)
(4) \( n \pi+\frac{\pi}{3} \leq x \leq \frac{2 \pi}{3}+n \pi \in I \)


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