Hello I need help with this , am studying but I just can’t get this

Given
Find
Length of AB
Explanation
[tex]\begin{gathered} \tan15\degree=\frac{AB}{BC} \\ \\ \tan15\degree=\frac{x}{6} \\ \\ x=6(\tan15\degree) \\ x=1.6077\approx1.61 \end{gathered}[/tex]Final Answer
Therefore , the length of AB is 1.61 miles