NCERT Solutions
Class 12 - Mathematics Part-1 - Chapter 5: CONTINUITY AND DIFFERENTIABILITY
Exercise 5.2

Question. 1

Differentiate with respect to \(x\): \(\sin(x^2+5)\).

Answer:

\(2x\cos(x^2+5)\)

Question. 2

Differentiate with respect to \(x\): \(\cos(\sin x)\).

Answer:

\(-\cos x\,\sin(\sin x)\)

Question. 3

Differentiate with respect to \(x\): \(\sin(ax+b)\).

Answer:

\(a\cos(ax+b)\)

Question. 4

Differentiate with respect to \(x\): \(\sec(\tan(\sqrt{x}))\).

Answer:

\(\dfrac{\sec(\tan\sqrt{x})\,\tan(\tan\sqrt{x})\,\sec^2\sqrt{x}}{2\sqrt{x}}\)

Question. 5

Differentiate with respect to \(x\): \(\dfrac{\sin(ax+b)}{\cos(cx+d)}\).

Answer:

\(a\cos(ax+b)\sec(cx+d)+c\sin(ax+b)\tan(cx+d)\sec(cx+d)\)

Question. 6

Differentiate with respect to \(x\): \(\cos(x^3)\cdot \sin^2(x^5)\).

Answer:

\(10x^4\sin(x^5)\cos(x^5)\cos(x^3)-3x^2\sin(x^3)\sin^2(x^5)\)

Question. 7

Differentiate with respect to \(x\): \(2\sqrt{\cot(x^2)}\).

Answer:

\(\dfrac{-2\sqrt{2}\,x}{\sin(x^2)\sqrt{\sin(2x^2)}}\)

Question. 8

Differentiate with respect to \(x\): \(\cos(\sqrt{x})\).

Answer:

\(\dfrac{-\sin\sqrt{x}}{2\sqrt{x}}\)

Question. 9

Prove that the function \(f\) given by \(f(x)=|x-1|\), \(x\in\mathbb{R}\), is not differentiable at \(x=1\).

Answer:

Question. 10

Prove that the greatest integer function defined by \(f(x)=[x]\), \(0<x<3\), is not differentiable at \(x=1\) and \(x=2\).

Answer:

NCERT Solutions Class 12 – Mathematics Part-1 – Chapter 5: CONTINUITY AND DIFFERENTIABILITY – Exercise 5.2 | Detailed Answers