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Question

\[\int\limits_0^{1/2} \frac{1}{\sqrt{1 - x^2}} dx\]
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Solution

\[Let I = \int_0^\frac{1}{2} \frac{1}{\sqrt{1 - x^2}} d x . Then, \]
\[I = \left[ \sin^{- 1} x \right]_0^\frac{1}{2} \]
\[ \Rightarrow I = \sin^{- 1} \frac{1}{2} - \sin^{- 1} 0\]
\[ \Rightarrow I = \frac{\pi}{6} - 0\]
\[ \Rightarrow I = \frac{\pi}{6}\]

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Definite Integrals
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Chapter 20: Definite Integrals - Exercise 20.1 [Page 16]

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RD Sharma Mathematics [English] Class 12
Chapter 20 Definite Integrals
Exercise 20.1 | Q 3 | Page 16

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