(1)如图1,若将圆心由点A沿AC方向运动到点C,求圆扫过的区域面积;
(2)如图2,若将圆心由点A沿ABC方向运动到点C,求圆扫过的区域面积;
(3)如图3,若将圆心由点A沿ABCA方向运动回到点A.
则I)阴影部分面积为_ ___;Ⅱ)圆扫过的区域面积为__ __.
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