To solve for the missing side length \( AB \) in the right triangle using the tangent ratio, we'll need some additional information. Typically, the tangent ratio is defined as:
\[ \tan(\theta) = \frac{\text{opposite}}{\text{adjacent}} \]
Where:
- \(\theta\) is one of the non-right angles in the triangle.
- The "opposite" side is the side opposite the angle \(\theta\).
- The "adjacent" side is the side next to the angle \(\theta\) that is not the hypotenuse.
In your problem, it appears that we need values for either the angle \(\theta\) or the lengths of the sides adjacent or opposite to it.
Without that specific information, I cannot compute \( AB \). If you can provide the angle measure and the length of the side adjacent to angle \( B \) or the opposite side, I can help you solve for \( AB \).