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  • Provide Solution For R.D.Sharma Maths Class 12 Chapter 18 Indefinite Integrals Exercise Revision Exercise Question 114 Maths Textbook Solution.

Provide Solution For  R.D.Sharma Maths Class 12 Chapter 18  Indefinite Integrals Exercise  Revision Exercise Question 114 Maths Textbook Solution.

Answers (1)

Answer: 3 x \sin ^{-1} x+3 \sqrt{1-x^{2}}+C

To solve this question we will use ILATE Method

Given:\int \sin ^{-1}\left(3 x-4 x^{3}\right) d x

Solution:

\int 3 \sin ^{-1} x d x

I=3 \int 1 \cdot \sin ^{-1} x d x

I=3 \int 1 \cdot \sin ^{-1} x d x

 

I=3\left[x \sin ^{-1} x-\int \frac{-d t}{2 \sqrt{t}}\right] \ldots \text { applying byparts }

I=3\left[x \sin ^{-1} x+\frac{1}{2} \int t^{-\frac{1}{2}} d t\right]

I=3\left[x \sin ^{-1} x+\frac{1}{2} \frac{t^{-\frac{1}{2}+1}}{-\frac{1}{2}+1}+C\right)

I=3\left[x \sin ^{-1} x+\frac{1}{2} \frac{\sqrt{t}}{\frac{1}{2}}+C\right]

I=\left[3 x \sin ^{-1} x+3 \sqrt{1-x^{2}}+C\right]

 

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