Step 1 :\(\sin^2 Z + \cos^2 Z = 1\)
Step 2 :\(\sin^2 Z = 1 - \cos^2 Z\)
Step 3 :\(\sin^2 Z = 1 - \left(\frac{5}{13}\right)^2\)
Step 4 :\(\sin^2 Z = 1 - \frac{25}{169}\)
Step 5 :\(\sin^2 Z = \frac{144}{169}\)
Step 6 :\(\sin Z = \pm\frac{12}{13}\)
Step 7 :\boxed{\frac{12}{13}}