Solve the following to find its value in terms of trigonometric ratios.
\(\rm\frac{\tan A+\sec A−1}{\tan A−\sec A+1}\)
1
\(\rm\frac{1−\sin A}{\cos A}\)
2
\(\rm\frac{1+\sin A}{\cos A}\)
3
\(\rm\frac{1−\cos A}{\sin A}\)
4
\(\rm\frac{1+\cos A}{\sin A}\)