(1)以AB为底边作等腰三角形ABC,
①当t=2时,点B的坐标为 ;
②当t=0.5且直线AC经过原点O时,点C与x轴的距离为 ;
③若上所有点到y轴的距离都不小于1,则t的取值范围是 .
(2)以AB为斜边作等腰直角三角形ABD,直线m过点(0,b)且与x轴平行,若直线m上存在点P,上存在点K,满足PK=1,直接写出b的取值范围.
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