求函数ƒ(x)=2sin(x+π/4)sin(x-π/4)+sin2x的最大值.

求函数ƒ(x)=2sin(x+π/4)sin(x-π/4)+sin2x的最大值.
【正确答案】:ƒ(x)=(sinx+cosx)(sinx-cosx)+sin2x=sin2x-cos2x=√2sin(2x-π/4)故ƒ(x)的最大值为√2