सिद्ध कीजिए कि-
`(tan theta + sec theta - 1)/( tan theta - sec theta + 1) = (1 + sin theta)/(cos theta) = (cos theta)/(1 - sin theta)`

Answer

` = ( 1)/(cos theta ) +(sin theta )/(cos theta ) =(1+ sin theta )/( cos theta ) =R.H.S `