(1)求点A的坐标;
(2)如图1,过B作的垂线交y轴负半轴于点D,,设点B的横坐标为t,长为d,求d与t的函数关系式(不要求写出自变量t的取值范围);
(3)如图2,在(2)的条件下,连接,当以的长为三边长构成的三角形面积是8时,在上取中点F,在上取点N,将射线绕点F顺时针旋转交x轴正半轴于点M,连接,若的周长为6,直线经过点N,求k的值.
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