y=sin(2x+派/3）会等于y=sin(2x-派/6）?或y=cos(2x-派/6）?
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y=sin(2x+派/3）会等于y=sin(2x-派/6）?或y=cos(2x-派/6）?y=sin(2x+派/3）会等于y=sin(2x-派/6）?或y=cos(2x-派/6）?y=sin(2x+派
y=sin(2x+派/3）会等于y=sin(2x-派/6）?或y=cos(2x-派/6）?
y=sin(2x+派/3）会等于y=sin(2x-派/6）?或y=cos(2x-派/6）?
y=sin(2x+派/3）会等于y=sin(2x-派/6）?或y=cos(2x-派/6）?
y=sin(2x+π/3）
=sin[π/2+(2x-π/6)]
=cos(2x-π/6)