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[" Q."23" coada "+cos^(2)(120^(@)+a)+cos...

[" Q."23" coada "+cos^(2)(120^(@)+a)+cos^(3)(12a^(@)-a)-(3sqrt(3))/(4)" then the general solution of "a" is "],[" 1) "0],[" 2) "0quad n tau,AA n in Z],[" 3) "Oquad (2n+1,(5)/(2),AA n in Z],[" 4) "Oquad 2n=(a)/(3),AA n in Z]

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