यदि $\begin{bmatrix} 1 & -\tan \theta \\ \tan \theta & 1 \end{bmatrix} \begin{bmatrix} 1 & \tan \theta \\ -\tan \theta & 1 \end{bmatrix}^{-1} = \begin{bmatrix} a & -b \\ b & a \end{bmatrix}$ है,तो

  • A
    $a = 1, b = 1$
  • B
    $a = \cos 2 \theta, b = \sin 2 \theta$
  • C
    $a = \sin 2 \theta, b = \cos 2 \theta$
  • D
    इनमें से कोई नहीं

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यदि $A = [a_{ij}]_{3 \times 3}$, जहाँ $a_{ij} = \begin{cases} 1, \text{ यदि } i + j \text{ सम है} \\ 0, \text{ यदि } i + j \text{ विषम है} \end{cases}$, तो $adj(A) = \dots$

यदि $A = \begin{bmatrix} 1 & \cot \frac{\theta}{2} \\ -\cot \frac{\theta}{2} & 1 \end{bmatrix}$ है,तो $A^{-1} =$

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यदि $A = \begin{bmatrix} a & b & c \\ d & e & f \\ l & m & n \end{bmatrix}$ एक ऐसा आव्यूह है कि $|A| > 0$ और $\text{Adj}(A) = \begin{bmatrix} 0 & 4 & -6 \\ 10 & 8 & 0 \\ 2 & 4 & -4 \end{bmatrix}$ है,तो $\frac{cd}{fb} + \frac{\ln}{em} = $

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