question_answer

If cos A + \[\mathbf{co}{{\mathbf{s}}^{\mathbf{2}}}\]A = 0 then the value of the expression \[\mathbf{si}{{\mathbf{n}}^{\mathbf{2}}}\mathbf{A}\text{ }\text{ }\mathbf{si}{{\mathbf{n}}^{\mathbf{4}}}\mathbf{A}\] is _________

A)  0    

B)  \[\frac{\sqrt{3}}{2}\]

C)  \[\frac{1}{\sqrt{2}}\]                                                                

D) 1

E) None of these