Monday, February 22, 2016

soft question - Surprising identities / equations

What are some surprising equations/identities that you have seen, which you would not have expected?




This could be complex numbers, trigonometric identities, combinatorial results, algebraic results, etc.



I'd request to avoid 'standard' / well-known results like $ e^{i \pi} + 1 = 0$.



Please write a single identity (or group of identities) in each answer.



I found this list of Funny identities, in which there is some overlap.

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