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In the given diagram ABCD is a cyclic qu...

In the given diagram ABCD is a cyclic quadrilateral `angleOCB = 50 ^(@)` and `angleBOC = 110^(@)` Find the value of `angleDAO` :

A

`20^@`

B

`30^@`

C

`50^@`

D

can't be determined

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The correct Answer is:
A
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