question_answer

It \[2si{{n}^{2}}\theta +{{\cos }^{2}}45{}^\circ =\tan 45{}^\circ \] and \[0\le \theta \le 90{}^\circ \], then the value of \[\tan \theta \] is

A) \[\sqrt{3}\]

B) \[1\]

C) \[\frac{1}{\sqrt{3}}\]

D) not defined