2.C3.D4. 4π,2根号下3,4π+3π/2,袭枝洞根号3, 4π-1π/2,-根号35. 1.正弦图像右移π/6,然后横坐标缩小到原来的1/2,纵坐标缩小为原来的1/3. 2.正弦图像横坐标扩大2倍,然后向搭带右平移3π/2,纵坐标扩大拍枯2倍
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