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10 cards from this deck
1
(cosθ,sinθ)(\cos \theta, \sin \theta)(cosθ,sinθ)
2π2\pi2π
sinθcosθ\frac{\sin \theta}{\cos \theta}cosθsinθ
When cosθ=0\cos \theta = 0cosθ=0
π\piπ
12\frac{1}{2}21
12\frac{1}{\sqrt{2}}21
−sinθ-\sin \theta−sinθ
cosθ\cos \thetacosθ
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