Question

the angle of dip at the equater is

Answer 1

The range of dip is from -90 degrees (at the South Magnetic Pole) to +90 degrees (at the North Magnetic Pole). Contour lines along which the dip measured at the Earth's surface is equal are referred to as isoclinic lines. 

Answer 2

the angle of dip at the equator is 0 and it's range is from -90 to 90 degree.