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

Options

A. `cot^(2) theta= cot^(2) theta_(1) + cot^(2) theta_(2)`
B. `tan^(2) theta= tan^(2) theta_(1) + tan^(2) theta_(2)`
C. `cot^(2) theta= cot^(2) theta_(1)- cot^(2) theta_(2)`
D. `tan^(2) theta= tan^(2) theta_(1)- tan^(2) theta_(2)`

Answer

A

Explanation

`cot^(2) theta= cot^(2) theta_(1) + cot^(2) theta_(2)` (standard result).