જો $\omega$ એ એકમનું ઘનમૂળ હોય,તો $\left| \begin{array}{ccc} 1 & \omega & \omega^2 \\ \omega & \omega^2 & 1 \\ \omega^2 & 1 & \omega \end{array} \right| = $

  • A
    $1$
  • B
    $0$
  • C
    $\omega$
  • D
    $\omega^2$

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જો $A_n = \begin{bmatrix} 1-n & n \\ n & 1-n \end{bmatrix}$ હોય,તો $|A_1| + |A_2| + \dots + |A_{2021}| = $

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જો $P, Q$ અને $R$ એ $\Delta PQR$ ના ખૂણાઓ હોય, તો $\left|\begin{array}{ccc}-1 & \cos R & \cos Q \\ \cos R & -1 & \cos P \\ \cos Q & \cos P & -1\end{array}\right|$ નું મૂલ્ય કેટલું થાય?

નિશ્ચાયક $\left| \begin{array}{ccc} 1 & 1 & 1 \\ 1 & 1-x & 1 \\ 1 & 1 & 1+y \end{array} \right|$ નું મૂલ્ય શું છે?

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