The value of \( \lim _{x \rightarrow \pi / 4} \frac{(\cos x+\sin x)^{3}-2 \sqrt{2}}{1-\sin 2 x} ...
The value of \( \lim _{x \rightarrow \pi / 4} \frac{(\cos x+\sin x)^{3}-2 \sqrt{2}}{1-\sin 2 x} \) is
(a) \( \frac{\sqrt{3}}{2} \)
(b) \( -\frac{3}{\sqrt{2}} \)
(c) \( \frac{1}{2} \)
(d) \( -\frac{1}{\sqrt{2}} \)
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