NCERT Solutions for Class 11 Maths Chapter 14 Exercise 14.5

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Class 11 Maths NCERT Solutions Chapter 14 Mathematical Reasoning Exercise 14.5 are based on the following concepts: 

  • New statements from old statements
  • Implications
  • Validating Statements
  • Conjunction

Download PDF NCERT Solutions for Class 11 Chapter 14 Mathematical Reasoning Exercise 14.5

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Chapter Related Topics
Irrational Number Prime Number Real Number

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CBSE CLASS XII Related Questions

  • 1.

    The value of \( \left[ \tan^{-1}(-1) + \cos^{-1}\left(-\frac{1}{2}\right) + \sin^{-1}\left(\frac{1}{2}\right) \right] \) is :

      • \( \frac{7\pi}{12} \)
      • \( \frac{5\pi}{12} \)
      • \( -\frac{5\pi}{12} \)
      • \( \frac{\pi}{3} \)

    • 2.

      Solve the differential equation \( (x+y)\,dy + (x-y)\,dx = 0 \), given that \( y(1) = 1 \).


        • 3.

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

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

          • 4.

            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

            • 5.

              For the given Linear Programming Problem, shade the feasible region on the graph and write the coordinates of the corner points.

              Minimize \(Z = 5x + 7y\)

              subject to constraints

              \[ 2x + y \geq 8 \]

              \[ x + 2y \geq 10 \]

              \[ x,\ y \geq 0. \]


                • 6.

                  If \(y = \sqrt{\log \left\{ \sin \left( \dfrac{x^2}{3} + 1 \right) \right\}}\), then show that

                  \[ \frac{dy}{dx} = \frac{x \cot \left( \dfrac{x^2}{3} + 1 \right)}{3y}. \]

                    CBSE CLASS XII Previous Year Papers

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