搜索
| hard classmate do loudly library |
When it came to math, Patrick was out of luck. “What are times tables?” the elf shouted
Elves knew nothing of human history. So the little elf, already a shouter, just got louder. “Go to the
In fact, every day in every way, Patrick was working
Finally, the last day of school arrived and the elf was free to go. As there was no more homework, he quietly ran out of the back door.
Patrick got his A’s; his
You see, in the end, Patrick still thought all his homework
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
