\( \lim _{n \rightarrow \infty} \mathrm{n} \cos \left(\frac{\pi}{4 ...
\( \lim _{n \rightarrow \infty} \mathrm{n} \cos \left(\frac{\pi}{4 n}\right) \sin \left(\frac{\pi}{4 n}\right) \) is equal to:
P
W
(a) \( \frac{\pi}{3} \)
(b) \( \frac{\pi}{4} \)
(c) \( \frac{\pi}{6} \)
(d) none of these
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