Matrices

Bihar Board Class 12 · Mathematics · 84 past questions

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1. Q7 2026 Set A2026 Set H2026 Set E2026 Set C2026 Set F2026 Set D2026 Set J2026 Set B2021 Set J2021 Set I

   If $A=\begin{bmatrix}\cos\alpha & \sin\alpha\\ -\sin\alpha & \cos\alpha\end{bmatrix}$ and $A+A'=I$ then…

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2. Q21 2025

   If $A = \begin{bmatrix}2 & -1 & 0\\3 & 4 & 5\end{bmatrix}$ and…

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3. Q75 2018

   If $A=\begin{bmatrix}\cos\alpha&-\sin\alpha\\\sin\alpha&\cos\alpha\end{bmatrix}$ and $A+A'=I_2$ then $\alpha=$

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