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A tangent \(AB\) is drawn from a point \(A\) to a circle with centre \(O\). Suppose \(BOC\) is the largest chord of the circle such that \(\angle AOC\) \(=\) \(107^{\circ}\), then find the \(\angle OAB\).
Answer:
\(\angle OAB\) \(=\) \(^{\circ}\)
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