1-1-1 루트2+1+파이/4
1-1-2 6827/176
1-1-3 기억안남
1-2-1 c=3/4
1-2-2 n=12
2-1-1 X(Cos세타,p-sin세타)
2-1-2 f(t)=t^4-4t^3+(4p+3)t^2
2-2-1 (2루트2/3,2/3)
2-2-2 p=루트2+1/4
2-3 1/4<p<3/8

개추좀