y=2sin²B+cos((2π/3)-2B)化简成y=Asin(ωx+φ)不对

来源:学生作业帮助网 编辑:作业帮 时间:2024/12/02 12:14:46
y=2sin²B+cos((2π/3)-2B)化简成y=Asin(ωx+φ)不对
x)5*S+.-0vN/~C|=ƚFNt>|]ó @;+Ϸi>tN"} k_`gC+iVP(Yڏ:f49Ac6H4 3a* 7mdǮg 66$ف(a

y=2sin²B+cos((2π/3)-2B)化简成y=Asin(ωx+φ)不对
y=2sin²B+cos((2π/3)-2B)化简成y=Asin(ωx+φ)
不对

y=2sin²B+cos((2π/3)-2B)化简成y=Asin(ωx+φ)不对
y=2sin²B+cos((2π/3)-2B)
=(1-cos2B)-1/2cos2B+√3/2sin2B
=(-3/2cos2B+√3/2sin2B)+1
=√3(1/2sin2B-√3/2cos2B)+1
=-√3(sin(2B-π/3)+1为所求
>.<