Question

Its second question im posting related to this....this tym plzz help...!!!

Answer 1

See.
Join CO.
After that angle BOC = 2times angle BAC i.e. angle a.
So OD is the bisector of angle BOC.
So when BOC is bisected, angle BOD = angle A..

Hope it helps...

Answer 2

Sorry for the nonconvenience

Here is your answer dear:-

Construction:-- Join OC
Now, OB = OD = OC
(since they are the radius of the circle)

Therefore, angle BDO = angle ODC= angle OBD = angle OCD.
( angles opposite to equal sides are equal)

From above angle BOD = angle DOC.

We know the, angle formed in the centre us double the angle formed on the circumference.

i.e. Angle BOC = 2 angle A
=>angle BOD + angle DOC = angle A + angle A

Hence, Angle A = Angle BOD = Angle DOC proved.

I hope it will help you.
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