学进去-教育应平等而普惠
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类型:任务型阅读
难度系数:0.65
所属科目:小学英语

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. B. C. D. E.
1. (      ) 2. (      ) 3. (      ) 4. (      ) 5. (      )
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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

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2019-09-19

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

用户名称
2019-09-19
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