I COS 6. sin 20. = CA34) 



i=l 



n 



y cos e. sin 6. Isin e.l = fASS) 



i=l 



n 



I cos 29. sin 20. = (A36) 



i=l 



n 



I cos 20. sin 0. |sin 0. | = (A37) 



i=l 



I sin 20. sin 0. |sin 0. | = (A38) 



i=l 



when taken over a complete wave cycle. As a result, only the squared 

 terms, and the terms involving the observed forces, F^ (0j^), remain in 

 these equations. The resulting expressions are: 



n n 



A, y cos^ 20. - y F (0.) cos 20. = (A39) 



1=1 1=1 



n n 



B, y sin^ 20. - y F (6.) sin 20. = CA40) 



1.^1 1 . ^T ov^ 1"^ 1 ^ -^ 



1=1 1=1 



n n n 



C- y i - I F (0.) = nC^- y F (0.) = CA41) 



l.'', .'^1 OV 1 1 .'', OV^ 1 



1=1 1=1 1=1 



n n 



D, y cos^ 6. - y F (0.) cos 0. = CA42) 



1.^. l.^T OV^l 1 



1=1 1=1 



131 



