爸爸对小冬说:“我今天去广州出差,不能亲自去车站接爷爷,你告诉妈妈,要她下午3点钟到香洲车站接爷爷。爷爷到后,你一定要代我向爷爷问好,让爷爷别忘了到公园去练习太极拳。”
小冬见到妈妈,忙对妈妈说:
小冬放学回家见到爷爷,忙对爷爷说:
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