In a magnetic of a certain place, the horizontal component of the earth magnetic field is $0.26 \;G$ and dip angle is $60^{\circ}$ What is the magnetic field of earth at this location ?

Question

$\begin{array}{1 1} 5.2 \;G \\ 52\;G \\ 0.52\;G \\ 0.052\;G \end{array} $