( ) 1.I'm eight years old.
![](http://static.xuejinqu.com/qimg/9b8/9b8c233a400743142965c6c31fe5c6cc.png)
( ) 2.I'm six years old.
![](http://static.xuejinqu.com/qimg/503/503078ff373fec0373e3425527751515.png)
( ) 3.I'm ten years old.
![](http://static.xuejinqu.com/qimg/7e4/7e4cb32e6fbb38946687638add3987b2.png)
( ) 4.I'm nine years old.
![](http://static.xuejinqu.com/qimg/4f5/4f5b1c194b9bbaec6d6c6f374a20aed8.png)
![](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)