WBJEE 2018 Math Solved Paper

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Question : 40 of 75
 
Marks: +1, -0
The Value of
lim
n→∞
‌
1
n
‌
[sec2‌
Ï€
4n
+sec2‌
2Ï€
4n
+.....
+sec2‌
nπ
4n
]
is
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