学进去-教育应平等而普惠
试题
类型:听力题
难度系数:0.94
所属科目:小学英语
听音,选出你听到的单词。         
____)1. A. thanks                                      B. sun                                      C. science
____)2. A. angry                                         B. and                                         C. any
____)3. A. some                                      B. jacket                                      C. subject
____)4. A. know                                       B. nose                                       C. mouth
____)5. A. music                                         B. me                                         C. new
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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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