question_answer

If \[\mathbf{sin}\alpha +\text{ }\mathbf{sin}\beta +\mathbf{sin}\gamma =\mathbf{3}\] then the value of \[\mathbf{si}{{\mathbf{n}}^{\mathbf{3}}}\alpha \mathbf{+si}{{\mathbf{n}}^{\mathbf{3}}}\beta \mathbf{+si}{{\mathbf{n}}^{\mathbf{3}}}\gamma -\mathbf{2sin}\alpha \mathbf{.sin}\beta \] \[-\,\mathbf{2sin}\beta \mathbf{sin}\gamma \mathbf{-2sin}\gamma \mathbf{.sin}\alpha \] is ________

A)  \[-\]1                                                               

B)  \[-\]2          

C)  \[-\]3    

D)  0        

E)  None of these