sin(2x+π/4)=1,2x+π/4=2kπ+π/2,k∈Z。解出x并写成集合形式,y max=3.sin(2x+π/4)=-1,2x+π/4=2kπ-π/2,k∈Z。解出x并写成集合形式,y min=-3..2.sin(1/2 x+π/3)=1,1/2 x+π/3=2kπ+π/2,k∈Z。解出x并写成集合形式,y max=1/2.sin(1/2 x+π/3)=-1,1/2 x+π/3=2kπ-π/2,k∈Z。解出x并写成集合形式,y min=1/2.