y=sin(2x-π/3) 怎么移变成sin2x

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sin(2x+π/4)怎样变成sin(x+π/2)
y=sinx的图象怎么变成y=2sin(3x-π/3).
y=3sin(2x+π/5)怎么变化得到y=2sin(2x+π/4)
=2[sin(2x)-sin(2x+π/3)]=2sin(2x-π/3)怎么变的?
π/2＜2x+π/3＜2π/3 如何变成 ?＜sin（2x+π/3）＜?
y=2sin三分之一x y=4sin(x-π/3) y=sin(2x+π/6) y=3sin(1/2x-π/4) 的周期
y=sin(π/4+x/2)sin(π/4-x/2) =sin(π/4+x/2)sin[π/2-(π/4+x/2)]
y=sin2x+3/sin2x x∈【π/3,π/2）最小值
y=3sin(2x+π/4)=3sin[2(x+π/8)] 为什么
sin(x+π) sin(x+3/2π)怎么化简?