学进去-教育应平等而普惠
试题
类型:填空题
难度系数:0.64
所属科目:小学英语
猜谜。
A riddle
Hello, everyone. I'm a word. I have three letters. My first letter is in “soon” but not in “moon”, my second letter is in”rose” and also in “rice”, my third letter is not in “pencil” but in “paper”, my whole is a place where there is a lot of water. I am the twin sister of the “see”. Who am I?
谜底:I am “____________”.
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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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