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If theta1 and theta2 be the apparent ang...

If `theta_1` and `theta_2` be the apparent angles of dip observed in two vertical planes at right angles to each other, then the true angle of dip `theta` is given by

A

`cos t ^(2) phi = cot ^(2) phi_(1)+ cot ^(2) phi _(2)`

B

`tan ^(2) phi = tan ^(2) phi+ tan ^(2) phi _(2)`

C

`cot phi = tan ^(2) phi _(1) + cot phi _(2)`

D

`tan phi = tan phi _(1) + tan phi _(2)`

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A
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