2. In the triangle \(A B C\),
- \(A B = 21 \mathrm {~cm}\)
- \(B C = 13 \mathrm {~cm}\)
- angle \(B A C = 25 ^ { \circ }\)
- angle \(A C B = x ^ { \circ }\)
- Use the sine rule to find the value of \(\sin x ^ { \circ }\), giving your answer to 4 decimal places.
Given also that \(A B\) is the longest side of the triangle,
find the value of \(x\), giving your answer to 2 decimal places.