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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) (2)`

B

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

C

`tan ^(-1) (sqrt2)`

D

`60^(@)`

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The correct Answer is:
B
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