Final answer:
The correct option is C Sin 48 degrees = 9/b.
Step-by-step explanation:
The given problem states:
A sin 48 degrees = b/9
And we need to determine which of the given options: A, B, C, or D, is correct.
To solve this problem, we can use the trigonometric identity for sine: sin(theta) = opposite/hypotenuse.
In this case, the opposite side is b and the hypotenuse is 9.
So, the correct equation is Sin 48 degrees = b/9 which matches option C.