Matrices

Bihar Board Class 12 · Mathematics · 84 past questions

13 of 84 · show all

1. Q1 2026 Set A2026 Set C2026 Set D2026 Set H

   $A=[4\;2\;3]\Rightarrow A'=$

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2. Q6 2026 Set A2026 Set H2026 Set E2026 Set C2026 Set F2026 Set D2026 Set J2026 Set B

   $A = \begin{bmatrix} 3 & -4 \\ 1 & -1 \end{bmatrix} \Rightarrow A + A' =$

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3. 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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4. Q11 2026 Set J2026 Set E2026 Set B2026 Set F

   $A=[\,4\ \ 2\ \ 3\,] \Rightarrow A' =$

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5. Q19 2025

   If $A = \begin{bmatrix} 2 & -1 & 0 \\ 7 & 3 & 5 \end{bmatrix}$ then $A' =$

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6. Q21 2025

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

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7. Q29 2025 Set A2025 Set E

   $A=\begin{bmatrix}1&2&3\end{bmatrix}\Rightarrow A'=$

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8. Q38 2024 Set D

   If $A=\begin{bmatrix}2&\sqrt2&0\\3&-2&\frac25\end{bmatrix}$ then $A'=$

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9. Q48 2024 Set J

   If $A=\begin{bmatrix}2&\sqrt{2}&0\\3&-2&\frac{2}{5}\end{bmatrix}$ then $A'=$

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10. Q63 2021 Set J2021 Set I

    $A$ is a square matrix, then $A+A'$ is necessarily

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11. Q70 2019 Set F

    If $A=\begin{bmatrix}1&2&3\\4&5&6\end{bmatrix}$, then which one of the following is equal to $A'$?

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12. 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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13. Q76 2018

    If A be a square matrix. Then $A + A'$ will be ..........

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