question_answer

If \[\sin \left( {{\sin }^{-1}}\frac{1}{5}+{{\cos }^{-1}}x \right)=1,\] then x is equal to

A)  \[1\]                            

B)  \[0\]

C)  \[\frac{4}{5}\]                         

D)  \[\frac{1}{5}\]

E)  None of these