Answer:
15/17
Step-by-step explanation:
It is the only one that makes sense logically, as side b, or in this case, KJ, is the second largest of the three sides of the triangle. Finding the sine of a triangle is opposite/hypotenuse, which would make sense that 15/17 is the answer because KJ isn't 8, and 15/17 is the only one that has he hypotenuse in the denominator. Additionally, using the pythagorean theorem we can find that 8²+15² equals 17², supporting the fact that this is a right triangle and that 15 is in fact the missing side.