Answer:
i believe it is c
Explanation:
the ratio for sin is the side opposite of the given angle divided by the hypotenuse. 
in this case we are doing this in terms of angle B so the side opposite is 5 and the hypotenuse is 
: so 5/ 

since its improper to have the root on the bottom, multiply the numerator and denominator by 
 and you should get 
