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The set of values of x satisfying the eq...

The set of values of `x` satisfying the equation `sin3alpha=4sinalphasin(x+alpha)sin(x-alpha)` is `npi+-pi/4,AAn in Z` `npi+-pi/3,AAn in Z` `npi+-pi/9,AAn in Z` `npi+-pi/(12),AAn in Z`

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