为啥sin(-x+m-π/3)=sin(x+m-π/3) -x+m-π/3=2kπ+x+m-π/3,-x+m-π/3=2kπ+π-(x+m-π/3)

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为啥sin(-x+m-π/3)=sin(x+m-π/3)-x+m-π/3=2kπ+x+m-π/3,-x+m-π/3=2kπ+π-(x+m-π/3)为啥sin(-x+m-π/3)=sin(x+m-π/3

为啥sin(-x+m-π/3)=sin(x+m-π/3) -x+m-π/3=2kπ+x+m-π/3,-x+m-π/3=2kπ+π-(x+m-π/3)
为啥sin(-x+m-π/3)=sin(x+m-π/3) -x+m-π/3=2kπ+x+m-π/3,-x+m-π/3=2kπ+π-(x+m-π/3)

为啥sin(-x+m-π/3)=sin(x+m-π/3) -x+m-π/3=2kπ+x+m-π/3,-x+m-π/3=2kπ+π-(x+m-π/3)
诱导公式
sin(a+2kπ)=sina
sin(2kπ+π-a)=sina