王老师对我们要求非常严厉。一次,考试卷发下来了,我接过试卷看了一眼,“99分,”便顺手把卷子塞进书包。王老师说:“你错了一道题,定正吗?”我漫不经心地回答:“没有。”王老师严厉地说:“马上改,不要放过一道错题。”我只好拿出试卷,把错题重做一遍,从此端正了有错毕改的好习惯。
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