w, . , ,
(145.1)
a , . (145.1) t.
coswt / sinwt , , :
(145.2)
, .
a. , :
1) a = mp (m = 0, 1, 2,...).
= (/), (145.3)
(. 205, ), (. 205, ). , (145.3), . ;
. 205
2) (m = 0, 1, 2,...).
(145.4)
, , (. 206). , = , (145.4) . , .
. 206
, . , , , *.
. 207
, . . 207 ( ) ( ; j).
, . . , .