question_answer

If\[\tan \theta =\frac{a}{b}\], find the value of\[\frac{\cos \theta +\sin \theta }{\cos \theta -\sin \theta }\].

A) \[\frac{{{a}^{2}}-{{b}^{2}}}{{{a}^{2}}+{{b}^{2}}}\]     

B)        \[\frac{a-b}{b-a}\]

C) \[\frac{b+a}{b-a}\]       

D) \[\frac{b}{a-b}\]

E) None of these