1 y=sinX向左移动π/4,得到y=sin(x+π/4)2 y=sin(x+π/4)沿x轴压缩为原来的1/3,得到y=sin(3x+π/4)3 y=sin(3x+π/4)沿y轴扩大2倍,得到y=2sin(3x+π/4)4 y=2sin(3x+π/4)向下平移2,得到y=2sin(3x+π/4)-2...