$\left|\begin{array}{cc}\sin \frac{2 \pi}{9} & \cos \frac{2 \pi}{9} \\ \sin \frac{5 \pi}{18} & \cos \frac{5 \pi}{18}\end{array}\right|=$ . . . . . . .

  • A
    $\tan \frac{\pi}{4}$
  • B
    $-\sin \frac{\pi}{18}$
  • C
    $\cot \frac{3 \pi}{4}$
  • D
    $\sin \frac{\pi}{18}$

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Similar Questions

જો $\omega$ એ એકમનું કાલ્પનિક ઘનમૂળ હોય અને $\left|\begin{array}{ccc}x+\omega^2 & \omega & 1 \\ \omega & \omega^2 & 1+x \\ 1 & x+\omega & \omega^2\end{array}\right|=0$ હોય, તો $x$ ની એક કિંમત કઈ છે?

બહુપદી $\left|\begin{array}{ccc}x+3 & x & x+2 \\ x & x+1 & x-1 \\ x+2 & 2x & 3x+1\end{array}\right|$ નું અચળ પદ શોધો.

જો $\left| \begin{array}{ccc} 1 & k & 3 \\ 3 & k & -2 \\ 2 & 3 & -1 \end{array} \right| = 0$ હોય,તો $k$ ની કિંમત શોધો.

જો $D = \left|\begin{array}{ccc}1 & -\cos \theta & -1 \\ \cos \theta & 1 & -\cos \theta \\ 1 & \cos \theta & 1\end{array}\right|$ હોય,અને $p$ અને $q$ એ અનુક્રમે $D$ ની મહત્તમ અને ન્યૂનતમ કિંમતો હોય,તો $2p + 3q$ ની કિંમત . . . . . . છે.

જો $\begin{vmatrix} a & 1 & 1 \\ 1 & b & 1 \\ 1 & 1 & c \end{vmatrix} > 0$ હોય,તો $abc >$

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