NCERT Solutions for Class 12 Maths Chapter 4 Determinants Exercise 4.1

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Class 12 Maths NCERT Solutions Chapter 4 Determinants Exercise 4.1 is given in this article. Chapter 4 Determinants Exercise includes questions on determinant of a matrix, determinants of a matrix of order one, determinants of a matrix of order two, and determinants of a matrix of order 3 × 3.

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Class 12 Chapter 4 Determinants Topics:

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CBSE CLASS XII Related Questions

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


      • 2.

        Sports car racing is a form of motorsport which uses sports car prototypes.The competition is held on special tracks designed in various shapes. 

        The equation of a sports car racing track is given as: \[ f(x)= \begin{cases} x^4-4x^2+4, & 0\leq x<3,\\ x^2+40, & x\geq 3 \end{cases} \] Based on this information:


          • 3.

            If \[ B(\operatorname{adj} B)= \begin{bmatrix} \frac{1}{3} & 0 & 0\\ 0 & \frac{1}{3} & 0\\ 0 & 0 & \frac{1}{3} \end{bmatrix}, \] then the value of \[ \det(B^{-1}) \] is: 

              • \(\frac{1}{3}\)
              • \(\frac{1}{9}\)
              • \(3\)
              • \(9\)

            • 4.
              The least value of \[ f(x)=e^{-x} \] in the interval \[ [0,3] \] is:

                • \( e^{-3} \)
                • \( -1 \)
                • \( 1 \)
                • \( -e^3 \)

              • 5.
                A function \[ f:\mathbb{R}-\left\{\frac{3}{5}\right\} \to \mathbb{R}-\left\{\frac{3}{5}\right\} \] is defined as \[ f(x)=\frac{3x+2}{5x-3}. \] Show that \(f\) is one-one and onto.


                  • 6.

                    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 \[ 3q(x)-\pi. \] 

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