  We discuss the impact of the presence of a charged Higgs and a $W'$ gauge
boson on the tau-neutrino nucleon scattering $\nu_{\tau}+ N \rightarrow \tau^-
+ X$ and $\bar{\nu}_{\tau}+ N \rightarrow \tau^+ + X$. We show the effect of
the new physics on the three subprocesses quasielastic, $\Delta$-resonance, and
deep inelastic scattering. The measurement of the atmospheric and reactor
mixing angles $\theta_{23}$ and $\theta_{13}$, respectively, relies on the
standard model cross section of the above processes if they have been measured
in the appearance channels $\nu_\mu \rightarrow \nu_\tau$ and $\bar{\nu}_e
\rightarrow \bar{\nu}_\tau$ ($\nu_e \rightarrow \nu_\tau$), respectively.
Consideration of the new physics contributions to those reactions modifies the
measured mixing angles, assuming the standard model cross section. We include
form factor effects in the new physics calculations and find the deviations of
the mixing angles which can be significant and can depend on the energy of the
neutrino.
