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A dip circle lies initially in the magnetic meridian. If it is now rotated through angle in the horizontal plane, then tangent of the angle of dip is changed in the ratio
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Correct option is A
Here, tanδ=BVBH and tanδ'=BVBH cos θ∴tan δ'tan δ=BVBH cos θ x BHBV =1cos θ
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The values of the apparent angles of dip in two planes at right angles to each other are . Then the true value of the angle of dip at the place is
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