"In a quadrilateral `A B C D ,\ C O\ a n d\ D O` are the bisectors of `/_C\ a n d\ /_D` respectively
Channel: Doubtnut
Date: 2020-06-28

"In a quadrilateral `A B C D ,\ C O\ a n d\ D O`
 are the bisectors of `/_C\ a n d\ /_D`
 respectively. Prove that `/_C O D=1/2(/_A+/_B)dot`"