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Long long ago, there were five blind men and an elephant. The first man touched the elephant’s back and said, “The elephant is like a bed.” The second man touched the elephant’s ears and said, “No, the elephant is like a big fan,”
“No, you are wrong. The elephant is like a big carrot (胡萝卜).” The third man touched the elephant’s tooth and said. The fourth man touched the elephant’s leg and said, “The elephant is just like a big pillar (柱子),” “You are wrong,” the last man touched the tail and said. “The elephant is just like a rope (绳子)”Were they right?
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
