So I am given a Vector $A$ where $$A=r^2\hat{e}\psi$$
This vector is already considered to be in spherical coordinates.
I am confused by the fact that I am not given $\hat{r} \hat{\theta}$ and instead am given $\hat{e}$, which makes no sense at it is not an angle.
Can anyone explain to me why $\hat{e}$ is part of the spherical coordinate system? Especially considering it is not an angle.