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10 cards from this deck
30°, 45°, 60°
1:3:21 : \sqrt{3} : 21:3:2
1:1:21 : 1 : \sqrt{2}1:1:2
12\frac{1}{2}21
111
32\frac{\sqrt{3}}{2}23
1,2,31, \sqrt{2}, \sqrt{3}1,2,3
cosθ=sin(90°−θ)\cos \theta = \sin(90° - \theta)cosθ=sin(90°−θ)
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