A magnetic dipole is acted upon by two magnetic fields which are inclined to each other at an angle of ${75}^{\mathrm{o}}$. One of the fields has a magnitude of $15 \mathrm{mT}$. The dipole attains stable equilibrium at an angle of ${30}^{\mathrm{o}}$ with this field. The magnitude of the other field (in $\mathrm{mT}$) is close to