The correct value of dip angle at a place is 45°. If
the dip circle is rotated by 45° out of meridian then
the tangent of the angle of apparent dip is
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Explanation:
Let δ 1 be the angle of dip when dip circle is in magnetic meridian
tanδ 1= HV
The dip circle when makes an angle θ , horizontal component of the earth's magnetic field is Hcosθ
The angle of dip when dip circle makes an angle with the magnetic meridian is,
tanδ 1= HcosθV
tanδ 1= cosθ
tanδ
tanδ 1= 2
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