A.
![](http://static.xuejinqu.com/qimg/09e/09e43c39921a31e18d373cdebf9fcee1.png)
![](http://static.xuejinqu.com/qimg/887/8870282befc3790fd920de542cf1308f.png)
![](http://static.xuejinqu.com/qimg/f0f/f0f25484bc8d5f3f954a57c7b8de4618.png)
![](http://static.xuejinqu.com/qimg/451/451de4c2fa9648c30a554f871f7b77de.png)
![](http://static.xuejinqu.com/qimg/e0c/e0c228282b5a9c1ae1887195d33eeb4e.png)
1.four
2.five
3.twenty
4.nine
5.sixteen
![](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)