The Earth S Magnetism

The actual angle of dip can be determined using the relationship between the angle of suspension , the magnetic declination (the angle with the magnetic meridian), and the angle of dip. The formula to calculate the actual angle of dip is given by:
where:
- is the actual angle of dip,
- is the angle between the magnet and the horizontal,
- is the angle the magnet makes with the magnetic meridian.
Substituting the values into the equation:
We know that and . Therefore:
Now, to find , we take the inverse tangent of both sides:
Using a calculator:
Thus, the actual angle of dip is approximately: