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TopNewestYeah, it's an elegant proof which was given by

Augustin Louis Cauchyand perhaps the most well-known and elementary proof because all other proofs require higher advanced calculus whereas this one uses none of such methods and only basic polynomial properties and some trigonometry.And I remember that I mentioned about it in one of my papers on Binomial Theorem.\(\ddot \smile\) – Kishlaya Jaiswal · 2 years ago

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