竹竿长/米 | 1 | 1.2 | 1.8 | 2 | 4 | 5 |
影长/米 | 0.5 | 0.6 | 0.9 | 1 | 2 | 2.5 |
比值 |
(1)算出竹竿和影长的比值,并填在表格中.
(2)通过测量和计算,你发现了什么?
(3)这时李明测出旗杆的影长是5米,你能求出旗杆的实际高度是多少米?
(4)这时王刚测出一棵松树的影长是2.4米,你能算出这棵松树的实际高度吗?
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