$0$ और $\frac{\pi}{2}$ के बीच स्थित $\theta$ का वह मान जो $\left|\begin{array}{ccc} 1+\sin^2 \theta & \cos^2 \theta & 4\sin 4\theta \\ \sin^2 \theta & 1+\cos^2 \theta & 4\sin 4\theta \\ \sin^2 \theta & \cos^2 \theta & 1+4\sin 4\theta \end{array}\right| = 0$ को संतुष्ट करता है,वह है:

  • A
    $\frac{5\pi}{24}$
  • B
    $\frac{7\pi}{24}$
  • C
    $\frac{\pi}{8}$
  • D
    $\frac{3\pi}{8}$

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यदि $a \neq p, b \neq q, c \neq r$ और $\left|\begin{array}{ccc}p & b & c \\ p+a & q+b & 2c \\ a & b & r\end{array}\right|=0$ है, तो $\frac{p}{p-a}+\frac{q}{q-b}+\frac{r}{r-c}$ का मान ज्ञात कीजिए :

यदि $A=\begin{bmatrix} 1 & 1 & 0 \\ 2 & 1 & 5 \\ 1 & 2 & 1 \end{bmatrix}$ है,तो $a_{11} A_{21} + a_{12} A_{22} + a_{13} A_{23} = \dots$

सारणिक का मान ज्ञात कीजिए: $\left| \begin{array}{ccc} a_1 & m a_1 & b_1 \\ a_2 & m a_2 & b_2 \\ a_3 & m a_3 & b_3 \end{array} \right|$

$\left|\begin{array}{ccc}1 & bc+ad & b^2c^2+a^2d^2 \\ 1 & ca+bd & c^2a^2+b^2d^2 \\ 1 & ab+cd & a^2b^2+c^2d^2\end{array}\right|=$

यदि $\left|\begin{array}{ccc}a^{2} & b c & c^{2}+a c \\ a^{2}+a b & b^{2} & c a \\ a b & b^{2}+b c & c^{2}\end{array}\right|=k a^{2} b^{2} c^{2}$ है, तो $k=$

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