问题
选择题
为了得到函数y=sin(2x-
|
答案
∵y=sin(2x-
)=sin(2x-π 3
-π 3
+π 6
)=sin(2x-π 6
+π 2
)=sin[2(x-π 6
)+π 4
]π 6
∴把函数y=sin(2x+
)的图象向右平移π 6
个单位即可得y=sin(2x-π 4
)的图象π 3
故选 C
为了得到函数y=sin(2x-
|
∵y=sin(2x-
)=sin(2x-π 3
-π 3
+π 6
)=sin(2x-π 6
+π 2
)=sin[2(x-π 6
)+π 4
]π 6
∴把函数y=sin(2x+
)的图象向右平移π 6
个单位即可得y=sin(2x-π 4
)的图象π 3
故选 C