f(x)=2cos的平方x+2√3sinxcosx=cos2x+√3sin2x+1=2sin(π/6+2x)+1,单调增区间为2kπ-π/2《π/6+2x 《2kπ+π/2,kπ-π/2《x《kπi+π/6,k属于z,(2)x属于[0 π/2] ,π/6+2x属于[0 ,7π/6] ,2sin(π/6+2x)属于[-1,2]...