`(i`) If the length of perpendicular from origin to the line `ax+by+a+b=0`
Channel: Doubtnut
Date: 2019-12-27

`(i`) If the length of perpendicular from origin to the line `ax+by+a+b=0` is `p`, then show that : `p^(2)-1=(2ab)/(a^(2)+b^(2))` `(ii)` If the length of perpendicular from point `(1,1)` to the line `ax-by+c=0` is unity then show that : `(1)/(a)-(1)/(b)+(1)/(C )=(c )/(2ab)`

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