学进去-教育应平等而普惠
试题
类型:口算和估算
难度系数:0.85
所属科目:小学数学
计算。
7×5=                           3×6=                     8×8=                    25÷5=                    48÷6=
81÷9=                    8×3=                     9÷3=                      63÷7=                    6×6=
5×7+8=                                        3×6-5=                                         7×4+5=
6×9-9=                                        3×4+4=                                        5×5-4=
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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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