∑P"( Am cos m+ Bmn m) P0242cOs20=-,P 2 0 COS 20 120 w(e,=c-p Po p cos 2o (p,q)=v(p,)+w(P b +c0s20+C-,P po p cos zpp 12 4 12 c+(p2-P2)+,p(2-p62)cos20 40 1 ( cos sin ) m m m m    A m B m  =  + 4 0 cos 2 12 b = −   m = 2 2 4 0 2 0 cos 2 cos 2 12 b     A = − 2 2 0 12 b A = −  2 2 2 0 0 ( , ) cos 2 4 12 a b w c       = − − u v w ( , ) ( , ) ( , )       = + 2 4 2 2 2 0 0 cos 2 cos 2 4 12 4 12 a b a b = + + − −        c 2 2 2 2 2 0 0 ( ) ( )cos 2 4 12 a b = + − + − c      