ધારો કે $A = \begin{bmatrix} 1 & \sin \theta & 1 \\ -\sin \theta & 1 & \sin \theta \\ -1 & -\sin \theta & 1 \end{bmatrix}$,જ્યાં $0 \leq \theta \leq 2 \pi$. તો

  • A
    $\operatorname{Det}(A) = 0$
  • B
    $\operatorname{Det}(A) \in [2, 4]$
  • C
    $\operatorname{Det}(A) \in (2, \infty)$
  • D
    $\operatorname{Det}(A) \in (2, 4)$

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જો $a, b, c$ એ $A.P.$ માં હોય,તો નિશ્ચાયક $\left|\begin{array}{lll}x+2 & x+3 & x+2a \\ x+3 & x+4 & x+2b \\ x+4 & x+5 & x+2c\end{array}\right|$ ની કિંમત શું થાય?

જો $a_i^2 + b_i^2 + c_i^2 = 1$ $(i = 1, 2, 3)$ અને $a_i a_j + b_i b_j + c_i c_j = 0$ $(i \ne j, i, j = 1, 2, 3)$ હોય,તો $\left| \begin{array}{ccc} a_1 & a_2 & a_3 \\ b_1 & b_2 & b_3 \\ c_1 & c_2 & c_3 \end{array} \right|^2$ ની કિંમત શોધો.

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જો ${\Delta _1} = \left| {\begin{array}{*{20}{c}}1&0\\a&b\end{array}} \right|$ અને ${\Delta _2} = \left| {\begin{array}{*{20}{c}}1&0\\c&d\end{array}} \right|$ હોય,તો ${\Delta _2}{\Delta _1}$ ની કિંમત શોધો.

જો શ્રેણિક $\begin{bmatrix} 0 & 1 & -2 \\ -1 & 0 & 3 \\ \lambda & -3 & 0 \end{bmatrix}$ અસામાન્ય (singular) હોય,તો $\lambda = $

$\left|\begin{array}{ccc}x & y & x+y \\ y & x+y & x \\ x+y & x & y\end{array}\right|$ ની કિંમત શોધો.

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