NCERT Solutions for Class 12 Maths Chapter 3 Matrices Exercise 3.1

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Jasmine Grover

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Class 12 Maths NCERT solutions chapter 3 Matrices Exercise 3.1 is covered in this article. Matrices along with the determinants have a weightage of 10 marks in the CBSE Examination. This Chapter 3 Matrices Exercise includes questions of order of matrix, types of matrices, and equality of matrices.

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CBSE CLASS XII Related Questions

  • 1.

    Solve the differential equation \( y + \frac{d}{dx}(xy) = x(\sin x + \log x) \).


      • 2.

        For events A and B, if \(P(B)=\frac{3}{5}\), \(P(A/B)=\frac{1}{2}\) and \(P(A\cup B)=\frac{4}{5}\), then \(P(A)\) is :

          • \(\frac{1}{2}\)
          • \(\frac{3}{5}\)
          • \(\frac{1}{5}\)
          • \(\frac{3}{10}\)

        • 3.

          The motion of a particle is described as \( S = 2t^{3} - 6t^{2} + 8 \). Its velocity \( \frac{dS}{dt} \), when the acceleration \( \frac{d^{2}S}{dt^{2}} \) vanishes is :

            • \( -6 \) unit/sec
            • \( 0 \) unit/sec
            • \( 18 \) unit/sec
            • \( 6 \) unit/sec

          • 4.

            Differential of \( \log \sin x \) with respect to \( \sqrt{\cos x} \) is :

              • \( -2\sqrt{\cos x}\cdot\cot x\cdot\operatorname{cosec} x \)
              • \( \sqrt{\cos x}\cdot\cot x\cdot\operatorname{cosec} x \)
              • \( \frac{2\sqrt{\cos x}}{\sin x} \)
              • \( \frac{1}{\sin x\sqrt{\cos x}} \)

            • 5.

              If \(P(A) = 0.3\), \(P(B) = 0.7\) and \(P(B/A) = 0.5\), then \(P(A \cup B)\) is :

                • \(0.35\)
                • \(0.85\)
                • \(0.5\)
                • \(0.21\)

              • 6.

                \( \int e^{x}\left( \frac{2+\sin 2x}{1+\cos 2x} \right) dx \) is equal to :

                  • \( \log \cos 2x + C \)
                  • \( \sec^{2} 2x + C \)
                  • \( e^{x}\tan x + C \)
                  • \( e^{x}\cot x + C \)
                CBSE CLASS XII Previous Year Papers

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