Monday 15 February 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.

No comments:

Post a Comment

real analysis - How to find $lim_{hrightarrow 0}frac{sin(ha)}{h}$

How to find $\lim_{h\rightarrow 0}\frac{\sin(ha)}{h}$ without lhopital rule? I know when I use lhopital I easy get $$ \lim_{h\rightarrow 0}...