49. Exemplar exercise problems XXIII

In figure, tangents $PQ$ and $PR$ are drawn to a circle such that $\angle RPQ = 30^\circ$. A chord $RS$ is drawn parallel to the tangent $PQ$. Find the $\angle RQS$.

[Hint: Draw a line through $Q$ and perpendicular to $QP$]

 

 

$\angle RQS =$ $^\circ$