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令p= 2 cosx=1.(6N)+22J.(cosm 1=】 =J,()+22(-1)”J(x) =Jo(x)-2J,(x+2J,(x-2J(x)+. 令p=0, 1=,()+22.() =J(x)+2J2(x)+2J(x)+2J(x)+. (n)-三.(np-2.(enap+三J.(小nmp =∑Jn(x)sinm-∑J-n(x)s小inm9 -(-1)-])inm=2)sin(2m+1)20 , 2  令 = ( ) ( ) 0 2 1 cos 2 cos m m x J x J x m  = = +  ( ) ( ) ( ) 0 2 1 2 1 m m m J x J x  = = + −  ( ) ( ) ( ) ( ) 0 2 4 6 = − + − + J x J x J x J x 2 2 2 令 = 0, ( ) ( ) 0 2 1 1 2 m m J x J x  = = +  ( ) ( ) ( ) ( ) 0 2 4 6 = + + + + J x J x J x J x 2 2 2 sin sin sin ( ) m ( ) m x J x m    =− =  ( ) ( ) 1 1 m m sin sin m m J x m J x m    − = =− = +   ( ) ( ) 1 1 m m sin sin m m J x m J x m     − = = = −   ( ) ( ) 1 1 1 sin m m m J x m  = = − −     ( ) ( ) 2 1 0 2 sin 2 1 m m J x m   + = = + 
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