y=sinx(sinx+cosx)
=sin²x+sinxcosx
=(1-cos2x)/2+1/2sin2x
=1/2[sin2x-cos2x]+1/2
=√2/2[sin2xcos45°-cos2xsin45°]+1/2
=√2/2sin(2x-45°)+1/2
∴最小正周期为T=2π/2=π;值域为【-√2/2+1/2,√2/2+1/2】
单调递增区间为 :2kπ-π/2
y=sinx(sinx+cosx)
=sin²x+sinxcosx
=(1-cos2x)/2+1/2sin2x
=1/2[sin2x-cos2x]+1/2
=√2/2[sin2xcos45°-cos2xsin45°]+1/2
=√2/2sin(2x-45°)+1/2
∴最小正周期为T=2π/2=π;值域为【-√2/2+1/2,√2/2+1/2】
单调递增区间为 :2kπ-π/2