14. Exercise Problem IX

In fig., \(A, B\), and \(C\) are three points on a circle with Centre \(O\) such that \(∠BOC=30^°\) and \(∠AOB=60^°\). If \(D\) is a point on the circle other than the arc \(ABC\), find \(∠ADC\).

 

 

\(∠ADC=\)