Let's salute cos 1
Geometry
Level
3
\[ \dfrac1A = \cos \dfrac{\pi}{11} \cos \dfrac{2\pi}{11} \cos \dfrac{3\pi}{11} \cos \dfrac{4\pi}{11} \cos \dfrac{5\pi}{11} \]
Find the value of the positive integer \(A\).
by
Akshat Sharda