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ICSE Class X Math 2019 Paper

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Question : 19 of 32
Marks: +1, -0
In the given figure AC\mathrm{AC} is a tangent to the circle with centre O\mathrm{O}.
If ∠ADB=55∘\angle \mathrm{ADB} = 55^{\circ}, find x\boldsymbol{x} and y\boldsymbol{y}. Give reasons for your answers.
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