(1)根据路线图,说一说小欣从家经过姑姑家到奶奶家和原路返回时所走的方向和路程,完成下表。
方向 | 路程/m | 时间/分 | |
小欣家到姑姑家 | 西偏南35° | 600 | 11 |
姑姑家到奶奶家 | 9 | ||
奶奶家到姑姑家 | 8 | ||
姑姑家到小欣家 | 12 | ||
全程 |
(2)小欣全程来回的平均速度是多少?
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