91 | 70 | 85 | 76 | 100 | 85 | 74 | 65 | 78 | 85 |
93 | 94 | 72 | 87 | 100 | 78 | 84 | 70 | 79 | 68 |
92 | 81 | 85 | 85 | 65 | 85 | 79 | 98 | 90 | 85 |
(1)根据上表完成下图.
(2)90分以上的学生有( )人.
(3)80分及以下的学生有( )人.
同类型试题
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
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