y=(sinx+cosx)²+1
=sin²x+cos²x+²sinxcosx+1
=1+sin2x+1
=sin2x+2
T=2π/2=π
答:最小正周期为π.
用到的公式:
sin²x+cos²x=1
sin2x=2sinxcosx
(a+b)²=a²+b²+2ab
y=Asin(ωx+φ)+b的最小正周期为T=2π/ω
y=(sinx+cosx)²+1
=sin²x+cos²x+²sinxcosx+1
=1+sin2x+1
=sin2x+2
T=2π/2=π
答:最小正周期为π.
用到的公式:
sin²x+cos²x=1
sin2x=2sinxcosx
(a+b)²=a²+b²+2ab
y=Asin(ωx+φ)+b的最小正周期为T=2π/ω