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The values of apparent angles of dip in ...

The values of apparent angles of dip in two places measured in two mutually perpendicular planes are `30^(@)` and `45^(@)`. Determine the true angle of dip at the place

A

`tan^(-1)(4)`

B

`cot^(-1)(4)`

C

`tan^(-1)(2)`

D

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

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The correct Answer is:
D
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