If cos`theta` = m, cot`theta` = n which will be got if `theta` is eliminated from them ?

Options

A. `n^2- m^2 = m^2 n^2`
B. `m^2 - n^2 = m^2 n^2`
C. `m^2 xx n^2 = m^2 n^2`
D. `m^2 + n^2= m^2 n^2`

Answer

B