(Ⅰ)如图①,求点B的坐标;
(Ⅱ)将矩形沿x轴向右平移,得到矩形,点O,C,D,E的对应点分别为,,,,设,矩形与重叠部分的面积为S.
①如图②,当点在x轴正半轴上,且矩形与重叠部分为四边形时,与相交于点F,试用含有t的式子表示S,并直接写出t的取值范围;
②当时,求S的取值范围(直接写出结果即可).
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