"In a triangle `A B C ,\\ C D`is the bisector of the angle `Cdot`If `cosC/2`has the value `1/3`and `
Channel: Doubtnut
Date: 28/01/2020

"In a triangle `A B C ,\\ C D`
is the bisector of the angle `Cdot`
If `cosC/2`
has the value `1/3`
and `l(C D)=6,`
then `(1/a+1/b)`
has the value equal to
`1/9`
(b) `1/(12)`
(c) `1/6`
(d) none"