Use the sine rule in a non-right-angled triangle

Triangle \(RST\) is non-right-angled

Side \(r\) is opposite angle \(R\), side \(s\) is opposite angle \(S\), and side \(t\) is opposite angle \(T\)

Angles \(R\) and \(S\) are \(75^{\circ}\) and \(52^{\circ}\), respectively. Angle \(T\) is the third angle of the triangle

Side \(s\) is 41 cm. Side \(r\) is unknown and must be found; side \(t\) is not required

The known side-angle pair is side \(s\) opposite angle \(S\)