$\theta \in (0, \pi /3)$ માટે,જેની માટે $\left| \begin{array}{ccc} 1 + \cos^2 \theta & \sin^2 \theta & 4 \cos 6\theta \\ \cos^2 \theta & 1 + \sin^2 \theta & 4 \cos 6\theta \\ \cos^2 \theta & \sin^2 \theta & 1 + 4 \cos 6\theta \end{array} \right| = 0$ થાય,તે $\theta$ ની કિંમત શોધો.

  • A
    $\frac{\pi }{18}$
  • B
    $\frac{\pi }{9}$
  • C
    $\frac{7\pi }{36}$
  • D
    $\frac{7\pi }{24}$

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જો $\left| \begin{matrix} 1 & 1 & 1 \\ a & b & c \\ a^2 & b^2 & c^2 \end{matrix} \right| = 5$ હોય,તો $\left| \begin{matrix} bc^2 - b^2c & a^2c - ac^2 & ab^2 - ba^2 \\ b^2 - c^2 & c^2 - a^2 & a^2 - b^2 \\ c - b & a - c & b - a \end{matrix} \right|$ ની કિંમત શોધો.

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$\left| \begin{array}{ccc} 441 & 442 & 443 \\ 445 & 446 & 447 \\ 449 & 450 & 451 \end{array} \right|$ નું મૂલ્ય શું છે?

જો $\omega$ એ એકમનું કાલ્પનિક ઘનમૂળ હોય, તો નિશ્ચાયક $\left|\begin{array}{ccc}1+\omega & 0 & -\omega \\ 1+\omega^{2} & \omega & -\omega^{2} \\ \omega+\omega^{2} & \omega & -\omega^{2}\end{array}\right|$ નું મૂલ્ય શું છે?

$\left|\begin{array}{ccc} a+b+2c & a & b \\ c & b+c+2a & b \\ c & a & c+a+2b \end{array}\right| = $

જો $A, B$ અને $C$ એ $n \times n$ શ્રેણિકો હોય અને $\det(A) = 2$,$\det(B) = 3$ અને $\det(C) = 5$ હોય,તો $\det(A^2BC^{-1})$ ની કિંમત શોધો.

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