question_answer

If \[\sin \theta -\cos \theta =0\], find the value of \[({{\sin }^{4}}\theta +{{\cos }^{4}}\theta )\]

A)  1                            

B)         \[\frac{3}{4}\]   

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

D)  \[\frac{1}{4}\]