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If angle of dip shown by a dip circle at...

If angle of dip shown by a dip circle at 30° with magnetic meridian is 60°, then the angle of dip shown by dip circle at 45° with magnetic meridian is

A

`tan^(-1) (sqrt3/2)`

B

`tan^(-1) (3/2)`

C

`tan^(-1) (1/√2)`

D

`tan^(-1) (3/√2)`

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