We develop the local
Kuznetsov trace formula on a unitary group in two variables for an unramified
quadratic extension of local, non-Archimedean fields E∕F and compare it to a local
relative trace formula on PGL(2,E). To define the local distributions for the relative
trace formula, we define a regularized local period integral and prove that it is a
PGL(2,F)-invariant linear functional. By comparison of the two local trace formulas,
we get an equality between a local PGL(2,F)-period and local Whittaker
functionals.