Once upon a time, there was a man named Lazy. He wanted to have a big house and it took him over a year to build one. The house was so beautiful that all of his
But as time went by, his house started to have some problems. One day,
A few days later, a mailman came by with a letter for Lazy. The mailman said, “Sir, your house is wonderful, but the windows are a bit dirty. You can make it more wonderful by
Weeks passed by. Lazy’s yard was in a mess. The paint was falling down and the windows were covered with dirt. One day, his brother came over
Just the next day, after a heavy rainstorm, Lazy’s house fell down!
There are many Lazys around

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

