Without expanding show that: =`|(cose c^2theta,cot^2theta,1),(cot^2theta,cosec^2theta,-1) ,(42 ,40, 2)|`=0

Explanation

To prove that the determinant

\[
D = \begin{vmatrix}
\csc^2 \theta & \cot^2 \theta & 1 \\
\cot^2 \theta & \csc^2 \theta & -1 \\
42 & 40 & 2
\end{vmatrix}
...