Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • School
  • Need solution for R.D.Sharma maths class 12 chapter 10 Differentiation exercise 10.3 question 3 math Textbook solution.

Need solution for R.D.Sharma maths class 12 chapter 10 Differentiation exercise 10.3 question 3 math Textbook solution.

Answers (1)

Answer : -\frac{-1}{2 \sqrt{1-x^{2}}}

Hint:

Use substitution method to differentiate this function

Given:

\sin ^{-1}\left\{\sqrt{ \left.\frac{1-x}{2}\right\}}\right\}, 0<x<1

Solution:

\begin{array}{l} \operatorname{Let} y=\sin ^{-1}\left\{\sqrt{\frac{1-x}{2}}\right\}\\\\ \end{array}

\begin{array}{l} \text { let } x =\cos 2 \theta \\\\ \left[\theta=\frac{1}{2} \cos ^{-1} x\right] \ \ - (1) \\ \end{array}

\begin{array}{l} \therefore y=\sin ^{-1}\left\{\sqrt{\frac{1-\cos 2 \theta}{2}}\right\} \\\\ =\sin ^{-1}\left\{\sqrt{\frac{2 \sin ^{2} \theta}{2}}\right\} \\\\ y =\sin ^{-1}\left\{\sqrt{\sin ^{2} \theta}\right\} \ \ \ \ \left[\because 1-\cos 2 \theta=2 \sin ^{2} \theta\right] \\\\ =\sin ^{-1}(\sin \theta) \\\\ y =\theta=\frac{1}{2} \cos ^{-1} x[\text { using (i)] } \end{array}

Now differentiating y w.r.t x then

 

\begin{array}{l} \frac{d y}{d x}=\frac{1}{2} \frac{d\left(\cos ^{-1} x\right)}{d x} \\\\ \quad=\frac{1}{2} \cdot \frac{-1}{\sqrt{1-x^{2}}} \\\\ \quad=\frac{-1}{2 \sqrt{1-x^{2}}} \quad\left[\because \frac{d}{d x} \cos ^{-1} x=\frac{-1}{\sqrt{1-x^{2}}}\right] \\\\ \therefore \frac{d y}{d x}=\frac{-1}{2 \sqrt{1-x^{2}}} \end{array}

Posted by

infoexpert22

View full answer

Crack CUET with india's "Best Teachers"

  • HD Video Lectures
  • Unlimited Mock Tests
  • Faculty Support
cuet_ads

Similar Questions

Trending Articles/News

anam-khan

CBSE reduces re-evaluation fee to Rs 100, to refund if marks change
anam-khan

CBSE defends OSM evaluation process, says re-evaluation option remains open
anam-khan

‘Feeling Devastated’: CBSE 12th students allege low marks due to on-screen marking; call for manual evaluation

Latest Question