f(x)=sin2x+2sin(π/4-x)cos(π/4-x)
=sin2x+sin[2(π/4-x)]
=sin2x+sin(π/2-2x)]
=sin2x+cos2x
=√2πsin(2x+π/4)
∴f(x)的最小正周期T=2π/2=π
-π/12≤x≤π/2
-π/6≤2x≤π
π/12≤2x+π/4≤5π/4
-√2/2≤sin(2x+π/4)≤1
值域[-1,√2]
f(x)=sin2x+2sin(π/4-x)cos(π/4-x)
=sin2x+sin[2(π/4-x)]
=sin2x+sin(π/2-2x)]
=sin2x+cos2x
=√2πsin(2x+π/4)
∴f(x)的最小正周期T=2π/2=π
-π/12≤x≤π/2
-π/6≤2x≤π
π/12≤2x+π/4≤5π/4
-√2/2≤sin(2x+π/4)≤1
值域[-1,√2]