question_answer

If \[\theta \] is an acute angle and\[\sin \theta =\cos \theta \], then find the value of \[2{{\tan }^{2}}\theta +{{\sin }^{2}}\theta -1\]

A) \[\frac{7}{2}\]              

B) \[\frac{2}{3}\]

C) \[\frac{2}{7}\]              

D) \[\frac{3}{2}\]

E) None of these