If $\lambda$ is the magnetic latitude at a place, then what is the relation between the angle of dip and $\lambda$ magnetic latitude .

Question

$\begin{array}{1 1} \tan \lambda= 2 \tan \delta \\ \tan \lambda= \frac{1}{2} \tan \delta \\\tan \lambda= \frac{1}{2} \tan \lambda \\\tan \lambda= 2 \tan \lambda \end{array} $