(1)在平面直角坐标系中,点,直线,O'为等腰直角关于直线l的“直角对称点”.
①当时,写出点的坐标______;
②连接,求 长度的取值范围;
(2)⊙O的半径为8,点M是上一点,以点M为直角顶点作等腰直角,其中,直线l与、分别交于E、F两点,同时为等腰直角关于直线l的“直角对称点”,连接;当点M在上运动时,直接写出长度的最大值与最小值.
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