Li Lei is a good pupil from Guilin. He comes to Yulin by bus. He likes English. But he isn’t good at math. He has sports every day. And he often helps his mother clean the room. Look! He is cleaning the window.
A.
![](http://static.xuejinqu.com/qimg/708/708b6d1ab9aa2445612ca11957190eec.png)
![](http://static.xuejinqu.com/qimg/d38/d3841cf2a31249214fc907323dac6fec.png)
![](http://static.xuejinqu.com/qimg/1b8/1b86a04e166f0bf26f39a51e781c36fa.png)
![](http://static.xuejinqu.com/qimg/ef5/ef5380a50317c25a32aa5b3ec136f3f0.png)
![](http://static.xuejinqu.com/qimg/0f2/0f21a079f66d4250d8319bee4d03fac7.png)
1.
![](http://static.xuejinqu.com/images/y-prise.png)
同类型试题
![](http://static.xuejinqu.com/images/medal.png)
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
![](http://static.xuejinqu.com/images/avatar.png)
![](http://static.xuejinqu.com/images/avatar.png)
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
![](http://static.xuejinqu.com/images/avatar.png)
![](http://static.xuejinqu.com/images/avatar.png)