समीकरण `( cos theta)/( 1 - sin theta) + (cos theta)/( 1+ sin theta) = 4 (theta lt
Channel: Doubtnut
Date: 2020-02-20

समीकरण `( cos theta)/( 1 - sin theta) + (cos theta)/( 1+ sin theta) = 4 (theta lt 90^(@))`  को हल कीजिए ।