question_answer

If \[\mathbf{co}{{\mathbf{s}}^{\mathbf{2}}}\theta \text{ }+\text{ }\mathbf{cos}\text{ }\theta =\mathbf{1}\], then find the value of \[\mathbf{si}{{\mathbf{n}}^{\mathbf{4}}}\theta \text{ }+\text{ }\mathbf{si}{{\mathbf{n}}^{\mathbf{2}}}\theta \].

A)  0                                                                    

B)  1           

C)  \[-\]1                                                                           

D) \[\cos \theta \]

E)  None of these