From the given right triangle, we are able to use the following definition of Sin(A):
![sin(A)=(OppositeLeg)/(Hypotenuse)](https://img.qammunity.org/2023/formulas/mathematics/college/bp3e6lxjo8ss1gylsuohyb7horhnhpootr.png)
By substituting the given values, we have the following:
![sin(A)=(CB)/(AB)=(12)/(13)](https://img.qammunity.org/2023/formulas/mathematics/college/wscwfn0iowr2ymmd7p7e4y8dhgv9gm5mct.png)
From the solution developed above, we are able to conclude that the answer to the proposed question is the option:
b. 12 / 13