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.

    Find the domain of \[ q(x)=\cos^{-1}(4x^2-3). \] Hence, find the value of \(x\) for which \[ q(x)=0. \] Also, write the range of \[ 3q(x)-\pi. \] 


      • 2.

        Check whether \[ f:\mathbb{R}-\{3\}\rightarrow\mathbb{R} \] defined as \[ f(x)=\frac{x-2}{x-3} \] is onto or not. 


          • 3.

            The domain of \[ f(x)=\cos^{-1}(2x-5) \] is: 

              • \([-1, 1]\)
              • \([4, 6]\)
              • \([-7, -3]\)
              • \([2, 3]\)

            • 4.
              For \[ f(x)=x+\frac{1}{x}, \quad x\neq 0. \]

                • local maximum value is 2
                • local minimum value is \( -2 \)
                • local maximum value is \( -2 \)
                • local minimum value \( < \) local maximum value

              • 5.
                Evaluate: \[ \cos\left[\sin^{-1}(-1)-\tan^{-1}(-\sqrt{3})\right]. \]


                  • 6.
                    Assertion (A) : In an experiment of throwing an unbiased die, the probability of getting a prime number given that number appearing on the die being odd is \( \frac{2}{3} \).
                    Reason (R) : For any two events \( A \) and \( B \), \( P(A|B) = \frac{P(A \cup B)}{P(B)} \).

                      • Both Assertion (A) and Reason (R) are true and the Reason (R) is the correct explanation of the Assertion (A).
                      • Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
                      • Assertion (A) is true and Reason (R) is false.
                      • Assertion (A) is false and Reason (R) is true.
                    CBSE CLASS XII Previous Year Papers

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