Let's salute cos 1

Geometry Level 3

1A=cos⁡π11cos⁡2π11cos⁡3π11cos⁡4π11cos⁡5π11 \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 AA.

Akshat Sharda by Akshat Sharda
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