学进去-教育应平等而普惠
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类型:听音,选择正确答案
难度系数:0.40
所属科目:小学英语
听录音,选答语。每小题读两遍。
(      ) 1. A. Thanks.              B. I’m fine, thank you.
(      ) 2. A. Here you are.       B. Have some bread.
(      ) 3. A. Thank you.              B. Happy birthday.
(      ) 4. A. It’s a pen.              B. Eight.
(      ) 5. A. Cool! I like it.       B. It’s a dog.
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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

用户名称
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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