“数风流人物,还看今朝。”张桂梅,改变山区女童命运的公益校长,被评为感动中国人物。这是写给她的颁奖词;“烂漫的山花中,我们发现你。自然击你以风雪,你报之以歌唱。命运置你于危崖,你馈人间以芬芳,不惧碾作法,无意苦争春,以怒放的生命,向世界表达倔强。你是崖畔的桂,雪中的梅。”
“不惧碾作法,无意苦争春”化用南宋诗人①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