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Fedor, Russia’s(俄罗斯的) first robot went into space. He got to the International Space Station(ISS) (国际空间站) on the 27th of August. The robot is 1.8 m tall and weighs 163kg.What can he do? He can do many things like we do. He is good at using computers. And he does well in driving. He stayed in the ISS for ten days and did some important work in space. He’s a good helper!
1．When did Fedor get to the International Space Station?2．Is Fedor 1.63m tall?
3．What can Fedor do?
4．How many days did Fedor stay in the ISS?
5．What did Fedor do in space?
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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
