图形 | 周长/dm | 长/dm | 宽/dm | 面积 |
长方形 | 20 | 9 | 1 | 9 |
20 | 8 | 2 | 16 | |
20 | 7 | 3 | 21 | |
20 | 6 | 4 | 24 | |
20 | 5 | 5 | 25 | |
圆 | 20 | 约31.85 |
分析上表实验记录,发现当长方形与圆的
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