  We use time-resolved spectra of the cataclysmic variable RW Tri in the I and
K-band to determine the orbital velocity of the secondary star using skew
mapping and cross correlation techniques respectively. We find radial velocity
amplitudes of 250+/-47km/s in the I-band, and 221+/-29km/s in the K-band. We
also determine the rotational velocity of the secondary star using the K-band
data and find a V(rot)sini of 120+/-20km/s. A combination of these results
coupled with an estimate of the effect of heating on the secondary star
suggests a mass ratio M_2/M_1 in the range 0.6-1.1; the mass ratio range with
no correction for heating is 0.5-0.8. These lead to most likely estimates of
the primary and secondary star masses in the range 0.4-0.7 solar mass and
0.3-0.4 solar mass respectively. Further refinement of the stellar masses is
hampered by uncertain knowledge of the white dwarf orbital velocity, and we
discuss evidence that at least some estimates of the white dwarf velocity are
contaminated by non-orbital components.
