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
直接写得数。
30×7=                    102×4=                    490÷7=                      60÷3=
214×2=                  8×200=                    100-57=                    488÷4=   
600÷2=                  880÷8=                    0×230=                    62+18=
45×2=                    0÷342=                    64÷4=                      87+0×6=
                                       1-                  
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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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