Mathematical Jokes

Cos(x), sin(x) and e^(x) go to a party. Sin(x) and cos(x) are partying away but e^(x) is miserable and anti social. Sin(x) and cos(x) go up to e^(x) and say 'what's wrong, why don't you integrate?'
It doesn't make any difference does it?

Beautiful Mathematics Formulae

Mathematics
It is amazing how 2 divergent series and sequence converge to give Euler's constant:
As n goes to infinity we have (1+1/2+1/3+1/4+...+1/n)-log(n)=0.577.