(1)在下面的方格图上依次标出点O(5,3),点A(2,3).
(2)连接OA,OA绕点O顺时针旋转90°,得到线段OB,用数对表示B的位置,是_______.
(3)并以O为圆心,OA为半径画一个圆.
(4)画出这个圆相互垂直的两条对称轴.
(5)已知每个方格的边长是1厘米,计算这个圆的周长和面积.
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