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Question

The true angle of dip at a given place on earth is equal to 53. If the plane of dip circle is at an angle of 60 with the magnetic meridian, then the apparent angle of dip will be (Take tan53=43)

[0.77 Mark]

A
tan1(83)
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B
tan1(54)
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C
tan1(43)
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D
tan1(73)
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Solution

The correct option is A tan1(83)
If apparent angle of dip is δ then,
tanδ=tanδcosϕ where, δ is the true angle dip and ϕ is inclination of plane of dip circle.
tanδ=tan53cos60
=4312=83


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