学进去-教育应平等而普惠
试题
类型:口算和估算
难度系数:0.65
所属科目:小学数学
口算。
3+6=               4+4=                 9-6=                  5+2=               8-6=
10-5=             9+1=                 4+5=                  7+3=               7-7=
6+2=               7-4=                 10-7=                 5+4=               8-0=
8-4=               5+5=                 1+8=                  4+3=               9-4=
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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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