-2sin(-x+m-π/3)=-2sin(x+m-π/3) sin(-x+m-π/3)=sin(x+m-π/3) 所以-x+m-π/3=2kπ+x+m-π/3或-x+m-π/

问题描述:

-2sin(-x+m-π/3)=-2sin(x+m-π/3) sin(-x+m-π/3)=sin(x+m-π/3) 所以-x+m-π/3=2kπ+x+m-π/3或-x+m-π/
以上过程是为什么

诱导公式
sin(a+2kπ)=sina
sin(2kπ+π-a)=sina