Determinants

CBSE Class 12 · Mathematics · 30 past questions

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1. Q2 2026

   One of the values of $x$ for which $\begin{vmatrix} \cos x & \sin x \\ -\cos x & \sin x \end{vmatrix} = 1$ is

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2. Q5 2026

   If $\begin{vmatrix}-1 & -2 & 5\\ -2 & a & -1\\ 0 & 4 & 2a\end{vmatrix}$ = –86, then the sum of all possible…

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