`cot^(-1)""(xy+1)/(x-y)+cot^(-1)""(yz+1)/(y-z)  +cot ^(-1) "" (zx +1)/(z-x)=0`
Channel: Doubtnut
Date: 2020-05-10

`cot^(-1)""(xy+1)/(x-y)+cot^(-1)""(yz+1)/(y-z)  +cot ^(-1) "" (zx +1)/(z-x)=0`