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
直接写出得数。
8-7=                                 1+9=                           6+3=                           9-4=
10+6=                           15-10=                            4-4=                                 6+5=
7+9=                           10-5=                           0+6=                           8-0=
8+3=                           6+6=                           6+10=                           5+5=
4+5=                           7-4=                                 4+8=                           13-10=
2+2+2=                           15-5-7=                           10-4+7=
6+4+6=                           16-10-3=                           8+8-10=
6+3+5=                           17-7-3=                           8-3+6=                           4+4+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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