If $m_{1}$ and $m_{2}$ are slopes of the lines represented by $\left(\sec ^{2} \theta-\sin ^{2}…
If $m_{1}$ and $m_{2}$ are slopes of the lines represented by
$\left(\sec ^{2} \theta-\sin ^{2} \theta\right) x^{2}-2 \tan \theta x y+\sin ^{2} \theta y^{2}=0$, then $\left|m_{1}-m_{2}\right|=$