Class 12Mathematics3 and 4 .Determinants and MatricesExpansion of determinants, Solution of equation in the form of determinants and area of triangle and Equation of Line
Mediumજો $\left| {\begin{array}{*{20}{c}}{\cos (A + B)}&{ - \sin (A + B)}&{\cos 2B}\\{\sin A}&{\cos A}&{\sin B}\\{ - \cos A}&{\sin A}&{\cos B}\end{array}} \right| = 0$ હોય,તો $B =$
- A$(2n + 1)\frac{\pi }{2}$
- B$n\pi $
- C$(2n + 1)\frac{\pi }{4}$
- D$2n\pi $
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ત્રિકોણનું ક્ષેત્રફળ $13$ ચોરસ એકમ છે જેના શિરોબિંદુઓ $A(8, 2)$,$B(k, 4)$ અને $C(6, 7)$ છે,તો $k$ ની પૂર્ણાંક કિંમત . . . . . . છે.
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 $A = \begin{bmatrix} k & 2 \\ 2 & k \end{bmatrix}$ અને $|A^3| = 125$ હોય,તો $k$ ની કિંમત શોધો.
જો $a + b + c = 0$ હોય,તો સમીકરણ $\left| \begin{array}{ccc} a - x & c & b \\ c & b - x & a \\ b & a & c - x \end{array} \right| = 0$ નો ઉકેલ શું છે?
Medium
View Solutionજો $\left| \begin{array}{ccc} \cos 2x & \sin^2 x & \cos 4x \\ \sin^2 x & \cos 2x & \cos^2 x \\ \cos 4x & \cos^2 x & \cos 2x \end{array} \right| = a_0 + a_1 \sin x + a_2 \sin^2 x + \dots$ હોય,તો $a_0$ ની કિંમત શોધો.
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