यदि $\left|\begin{array}{ccc}\cos (A+B) & -\sin (A+B) & \cos (2 B) \\ \sin A & \cos A & \sin B \\ -\cos A & \sin A & \cos B\end{array}\right|=0$ है,तो $B$ का मान ज्ञात कीजिए।

  • A
    $n \pi, n \in Z$
  • B
    $(2 n+1) \frac{\pi}{2}, n \in Z$
  • C
    $(2 n+1) \frac{\pi}{4}, n \in Z$
  • D
    $2 n \frac{\pi}{3}, n \in Z$

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Similar Questions

$\left|\begin{array}{lll}10 & 11 & 12 \\ 11 & 12 & 13 \\ 12 & 13 & 14\end{array}\right|=$ . . . . . . .

यदि $a_{1}, a_{2}, a_{3}, \ldots, a_{9}$ एक $AP$ में हैं,तो $\left|\begin{array}{lll}a_{1} & a_{2} & a_{3} \\ a_{4} & a_{5} & a_{6} \\ a_{7} & a_{8} & a_{9}\end{array}\right|$ का मान क्या है?

सारणिक $\left| \begin{array}{ccc} 31 & 37 & 92 \\ 31 & 58 & 71 \\ 31 & 105 & 24 \end{array} \right|$ का मान है

$ \left|\begin{array}{ccc} 3x+1 & 2x-1 & x+2 \\ 5x-1 & 3x+2 & x+1 \\ 7x-2 & 3x+1 & 4x-1 \end{array}\right| $ के विस्तार में अचर पद है

यदि $\left|\begin{array}{ccc}0 & ab^2 & ac^2 \\ a^2b & 0 & bc^2 \\ a^2c & b^2c & 0\end{array}\right|=m(abc)^k$ है, तो $m+k=$ . . . . . . .

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