f(x)=2cosx.cos(x-π/6)-√3(sinx)^2+sinxcosx =2cosx*(cosx*cosπ/6+sinx*sinπ/6)-√3(sinx)^2+sinx*cosx =2cosx*(√3/2*cosx+1/2*sinx)-√3(sinx)^2+sinx*cosx =√3(cosx)^2+sinx*cosx-√3(sinx)^2+sinx*cosx =√...