question_answer

Simplify tan\[\frac{\mathbf{\pi }}{\mathbf{18}}\mathbf{.tan}\frac{\mathbf{\pi }}{\mathbf{9}}\mathbf{.tan}\frac{\mathbf{\pi }}{\mathbf{4}}\]\[\mathbf{.tan}\frac{\mathbf{4\pi }}{\mathbf{9}}\mathbf{.tan}\frac{\mathbf{7\pi }}{\mathbf{18}}\]

A)  0                                                                    

B)  1      

C)  2                                                                    

D) tan\[\frac{\pi }{3}\]            

E)  None of these