- #1
Master J
- 226
- 0
Ive come across a few derivations whereby a few changes that don't see so obvious to me occur.
For instance, this one:
Integral, from 0 to infinity, of x.sin(ax), whereby it becomes x.exp(iax) / 2i, from minus infinity to plus. How can the limits be changed like that, and what about the exp(-iax) ?
Cheers chaps!
For instance, this one:
Integral, from 0 to infinity, of x.sin(ax), whereby it becomes x.exp(iax) / 2i, from minus infinity to plus. How can the limits be changed like that, and what about the exp(-iax) ?
Cheers chaps!