Let Me Give You More Trouble
Calculus
Level
4
\[ \large \lim_{x \to 0} \frac{ 1- \displaystyle \prod_{k=1}^{100} \cos kx}{x^2} = \, ? \]
Bonus: Generalize for \(n\) or \[ \lim_{x \to 0} \frac{ 1- \displaystyle \prod_{k=1}^{n} \cos kx}{x^2}\]
For other problems: Check your Calibre
by
Md Zuhair