If `|z-i|=1` and arg (z) `=theta` where `0 lt theta lt pi/2`, then `cottheta-2/z` equals
Channel: Doubtnut
Date: 24/05/2020

If `|z-i|=1` and arg (z) `=theta` where `0 lt theta lt pi/2`, then `cottheta-2/z` equals