यदि \( f(x)=\left\{\begin{array}{cc}\frac{\sqrt{2} \cos x-1}{\cot x-1}, & x \neq \frac{\pi}{4}, ...
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यदि \( f(x)=\left\{\begin{array}{cc}\frac{\sqrt{2} \cos x-1}{\cot x-1}, & x \neq \frac{\pi}{4}, x=\frac{\pi}{4} \\ 2 \alpha, & x=\pi / 4\end{array}\right. \) पर सतत् है, तो \( \alpha \) का
मान होगा-
(A) 2
(B) \( \frac{1}{4} \)
(C) \( -\frac{1}{2} \)
(D) \( \sqrt{2} \)
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