જો $f(x) = \left| \begin{array}{ccc} 2 \cos^2 x & \sin 2x & \sin x \\ \sin 2x & 2 \sin^2 x & -\cos x \\ \sin x & -\cos x & 0 \end{array} \right|$ હોય, તો $\int_0^{\frac{\pi}{4}} (2|f(x)| + 5f'(x)) \, dx$ ની કિંમત શોધો.

  • A
    $0$
  • B
    $\frac{\pi}{4}$
  • C
    $\frac{\pi}{2}$
  • D
    $\pi$

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જો $f(x) = \left| \begin{array}{ccc} \cos x & 1 & 0 \\ 0 & 2 \cos x & 3 \\ 0 & 1 & 2 \cos x \end{array} \right|$ હોય,તો $\lim_{x \rightarrow \pi} f(x)$ ની કિંમત શોધો.

જો શ્રેણિક $A=\left[\begin{array}{cccc}1 & 2 & 3 & 0 \\ 2 & 4 & 3 & 2 \\ 3 & 2 & 1 & 3 \\ 6 & 8 & 7 & \alpha\end{array}\right]$ નો નિશ્ચાયક (rank) $3$ હોય,તો $\alpha$ ની કિંમત શોધો.

જો $\left| \begin{array}{ccc} 1 + ax & 1 + bx & 1 + cx \\ 1 + a_1x & 1 + b_1x & 1 + c_1x \\ 1 + a_2x & 1 + b_2x & 1 + c_2x \end{array} \right| = A_0 + A_1x + A_2x^2 + A_3x^3$ હોય,તો $A_1$ ની કિંમત શોધો.

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જો $A = \begin{vmatrix} x & 1 & 1 \\ 1 & x & 1 \\ 1 & 1 & x \end{vmatrix}$ અને $B = \begin{vmatrix} x & 1 \\ 1 & x \end{vmatrix}$ હોય,તો $\frac{dA}{dx}$ ની કિંમત શોધો.

ધારો કે $f(x) = \begin{vmatrix} \cos x & \sin x & \cos x \\ \cos 2x & \sin 2x & 2\cos 2x \\ \cos 3x & \sin 3x & 3\cos 3x \end{vmatrix}$. તો $f'\left(\frac{\pi}{2}\right) = $

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