If latus rectum of ellipse `x^2 tan^2 phi + y^2 sec^2 phi = 1` is `1/2`, then `(0ltphi ltpi)`
Channel: Doubtnut
Date: 2020-04-12

If latus rectum of ellipse `x^2 tan^2 phi + y^2 sec^2 phi = 1` is `1/2`, then `(0ltphi ltpi)` is equal to (A) `pi/2` (B) `pi/6` (C) `pi/3` (D) `pi/12`