$0 < \theta < \frac{\pi}{2}$ માટે,જો $A = \begin{bmatrix} 1 & -\cos \theta & -1 \\ \cos \theta & 1 & -\cos \theta \\ 1 & \cos \theta & 1 \end{bmatrix}$ હોય,તો $\operatorname{det}(A)$ વિશે નીચેનામાંથી શું સાચું છે?

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

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Similar Questions

$\left|\begin{array}{ccc}x & 3 & 5 \\ 2 & 6 & 10 \\ 7 & 21 & 35\end{array}\right|=0$ નો ઉકેલ ગણ . . . . . . છે.

$\theta$ ના મૂલ્યોનો સમૂહ જેના માટે સમીકરણોની સિસ્ટમ $(\sin 3 \theta) x-y+z=0$,$(\cos 2 \theta) x+4 y+3 z=0, 2 x+7 y+7 z=0$ નો બિન-તુચ્છ ઉકેલ મળે,તે છે

જો $\left| \begin{array}{ccc} \cos 2x & \sin^2 x & \cos 4x \\ \sin^2 x & \cos 2x & \cos^2 x \\ \cos 4x & \cos^2 x & \cos 2x \end{array} \right| = a_0 + a_1 \sin x + a_2 \sin^2 x + \dots$ હોય,તો $a_0$ ની કિંમત શોધો.

જો $\left| \begin{array}{ccc} 5 & 3 & -1 \\ -7 & x & -3 \\ 9 & 6 & -2 \end{array} \right| = 0$ હોય,તો $x$ ની કિંમત શોધો:

જો $2\left|\begin{array}{ll}\sin ( A + B ) & \cos ( A + B ) \\ \cos ( A - B ) & \sin ( A - B )\end{array}\right|+\sqrt{3}= 0$ હોય,તો $A =$ . . . . . . .

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