选项 | A | B | C | D |
选择人数 | 15 | 5 | 90 | 10 |
(1)根据统计表画出扇形统计图;
要求:画图前先求角;画图可借助任何工具,其中一个角的作图用尺规作图(保留痕迹,不写作法和证明);统计图中标注角度.
(2)如果这个选择题满分是3分,正确的选项是C,则估计全体学生该题的平均得分是多少?
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