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试题
类型:其他计算
难度系数:0.65
所属科目:小学数学
算一算,填一填
7×3=             3+9=             5×4=                    3×6=
4+4=            8×8=               9×2=                    8×6=
6×5+6=(       )×(       )                      6×5+5=(       )×(       )
4×7=               4×6=             8+8=                  6×9=
4+8=             8×4=             5×2=                    3+3=
7×8-7=(       )×(       )                  7×8-8=(       )×(       )
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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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