  We consider the azimuthal asymmetries in semi-inclusive deep inelastic
leptoproduction arising due to both perturbative and nonperturbative effects at
HERMES energies and show that the $k_T^2/Q^2$ order corrections to $< \cos\phi
>$ and $< \cos2\phi >$ are significant. We also reconsider the results of
perturbative effects for $< \cos\phi >$ at large momentum transfers \cite{A1}
using the more recent sets of scale-dependent distribution and fragmentation
functions, which bring up to $18{%}$ difference in $< \cos\phi >$. In the same
approach we calculate the $< \cos2\phi >$ as well.
