If the radius of the circumcircle of the...

If the radius of the circumcircle of the isosceles triangle ABC is equal to `AB(=AC),` then the angle A is equal to-

A

`(pi)/(6)`

B

`(pi)/(3)`

C

`(pi)/(2)`

D

`(2pi)/(3)`

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The correct Answer is:

D

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