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The correct value of the dip angle at a ...

The correct value of the dip angle at a place is `45^@`. The dip circle is rotated through `45^@` out of the magnetic meridian. The apparent angle of dip will be :

A

`tan^-1 sqrt2`

B

`tan^-1 1/sqrt2`

C

`tan^-1 2`

D

`tan^-1 1/2`.

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