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In DeltaABC angle bisector of angleA, an...

In `DeltaABC` angle bisector of `angleA, angleB angleC` meets cuts circumcircle at x, y, z respectively. If `angleA=50^(@), angleCzy=30^(@)` find `angleBYZ`.

A

`35^(@)`

B

`30^(@)`

C

`45^(@)`

D

`55^(@)`

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