1.Today is
![](http://static.xuejinqu.com/qimg/253/25315bd4accbd7eb2a144a6c9784caad.png)
2.She has her birthday party on
![](http://static.xuejinqu.com/qimg/3a8/3a8c95af94a060ec3d70d1e91f51e7c5.png)
3.Teachers' Day is on
![](http://static.xuejinqu.com/qimg/b0c/b0c1ee897e94ba77d4b17e5153932544.png)
4.Women's Day is on
![](http://static.xuejinqu.com/qimg/cef/cefc863f13f95a5907aa321a0524d608.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)