Please solve 3,5 with explanation.:

(iii) $\frac{\tan \theta }{1-cot \theta }+\frac{cot \theta }{1- \tan \theta }=1+ sec \theta \cos ec \theta$
[Hint: Write the expression in terms of sing $\theta$ and cos  $\theta$]

(v) $\frac{\cos A- Sin A +1}{\cos A+ Sin A -1}=\cos ec A+Cot A,$ using the ident.