将y=2cos(x/3+π/6)的图像按向量α=[一(π/4)，一2]平移，则平移后所得图像的解析式为()
A.y=2cos(x/3+π/4)一2 B.y=2cos(x/3一π/4)+2 C.y=2cos(x/3一π/12)-2 D.y=2cos(x/3+π/12)+2正确答案A
将y=2cos(x/3+π/6)的图像按向量α=[一(π/4)，一2]平移，则平移后所得图像的解析式为()
A.y=2cos(x/3+π/4)一2 B.y=2cos(x/3一π/4)+2 C.y=2cos(x/3一π/12)-2 D.y=2cos(x/3+π/12)+2正确答案A
