mat2d[a_,b_,c_,d_] := {{a,b},{c,d}}

vvec2d[a_,b_] := {{a},{b}}

vvec2d[a_] := vvec2d[a[[1]],a[[2]]]

TeXForm[vvec2d[{1,2}]]

rote2d[t_] := mat2d[Cos[t],-Sin[t],Sin[t],Cos[t]]

TeXForm[rote2d[α]]