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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 is give by :

A

`tan^2theta = tan^2theta_1 +tan^2theta_2`

B

`cot^2theta=cot^2theta_1-cot^2theta_2`

C

`tan^2theta = tan^2theta_1 -tan^2theta_2`

D

`cot^2theta=cot^2theta_1+cot^2theta_2`

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