Question Id : 15579 |
Context : JEE Main 2019 (9 January Evening Shift)
If
$A=\begin{bmatrix}
e^{t} & e^{-t}\cos t & e^{-t}\sin t\\[4pt]
e^{t} & -e^{-t}\cos t - e^{-t}\sin t & -e^{-t}\sin t + e^{-t}\cos t\\[4pt]
e^{t} & 2e^{-t}\sin t & -2e^{-t}\cos t
\end{bmatrix}$,
then $A$ is:
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