Where on the earth's surfaces is the value of angle of dip maximum?

Horizontal component of earth's magnetic field at a place is sqrt3 times the vertical component. What is the value of angle of dip at this place?

The horizontal component of the earth's magnetic field at a place is B_H and angle of dip is 60^@ What is the value of vertical component of earth's magnetic field at equator?

The vertical component of the earth's magnetic field at a given place is sqrt3 times its horizontal component. If total intensity of earth's magnetic field at the place is 0.4G, find the vale of angle of dip