Recent content by maxknrd

Okey so I will then probably have to write it down. Thank you. I just really hoped there are some relations of taking a dotproduct/crossproduct with the vector itself

This page is brilliant. The problem I have though, is that I don't know anything about r. I just know, that a is constant. The identities are a great help, but with that I would just endup writing long equations like the one I started in the original post and couldn't come to a clear solution imo

The second dot was supposed to be a normal multiplication point. I assumed that this was a normal notation for multiplication of a scalar and a vector

I am sorry. I corrected it.

This is more of a general question, but I've encountered this kind of exercises a lot in my current preperations for my exam: There are two cases but the exercise is pretty much the same: Compute $$(1) \space \operatorname{div}\vec{A}(\vec{r}) \qquad , where \thinspace...