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If O is the centre of a circle with radi...

If O is the centre of a circle with radius r and AB is a chord of the circle at a distance `r/2` from O, then `/_BAO=`

Text Solution

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let `OD = r `
`OC= r/2`
in `/_ OAC & /_DAC`
`SAS ~ /_OAC ~= /_DAC`
so, `OA=DA`
Now , in`/_OAD` equilateral
`/_AOD= 60^@`
`/_CAO = /_BAO = 30^@`
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