Calculating Length in a Right Triangle Using Tangent

In triangle XYZ, angle X measures $45^{\circ}$, and side YZ (the side opposite angle X) has a length of 8 units. Calculate the length of side XZ (the side adjacent to angle X).

Use the trigonometric relationship for tangent, where: $$\tan(\theta) = \f\frac{\text{opposite}}{\text{adjacent}}$$.