Prove that  `tan ^(-1).  3/4+ tan^(-1) . 3/5 - tan^(-1) . 8/19 = pi/4`
Channel: Doubtnut
Date: 2020-05-24

Prove that  `tan ^(-1).  3/4+ tan^(-1) . 3/5 - tan^(-1) . 8/19 = pi/4`