(1)若不用毛刷擦冰面,则冰壶停止的位置距离营垒圆心O点多远?
(2)如果在中心线上已经静止着一个与冰壶A完全相同的冰壶B,如图乙所示,冰壶B距圆心O的距离为,若仅对冰壶A前擦冰面,要使A能够沿中心线将B撞出营垒区,则运动员用毛刷擦冰面的长度至少为多少?
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