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Suppose sin3sin3x=∑nm=0Cm cos n x is an identity in x, Where C0,C1,…Cn are constants and Cn≠0. Then the value of n is___

Answer» Suppose sin3sin3x=nm=0Cm cos n x is an identity in x,
Where C0,C1,Cn are constants and Cn0. Then the value of n is___


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