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The dip at a place is δ. For measuring it, the axis of the dip needle is perpendicular to the magnetic meridian. If the axis of the dip needle makes angle θ with the magnetic meridian, the tangent of apparent dip will be given tan δ1, which is equal to

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a

tan δ cos θ

b

tan δ sec θ

c

tan δ sin θ

d

tan δ cosec θ

answer is B.

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Detailed Solution

tan δ=BVBH and tan δ1=BVBH cosθor tan δ1=tan δcos θ=tan δ sec θ

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