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प्रश्न
Differentiate \[\sin \left( 2 \sin^{- 1} x \right)\] ?
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उत्तर
\[\text{ Let } y = \sin\left( 2 \sin^{- 1} x \right)\]
Differentiate it with respect to x we get,
\[\frac{d y}{d x} = \frac{d}{dx}\left[ \sin\left( 2 \sin^{- 1} x \right) \right]\]
\[ = \cos\left( 2 \sin^{- 1} x \right)\frac{d}{dx}\left( 2 \sin^{- 1} x \right) \left[ \text{Using chain rule} \right]\]
\[ = \cos\left( 2 \sin^{- 1} x \right) \times 2\frac{1}{\sqrt{1 - x^2}}\]
\[ = \frac{2\cos\left( 2 \sin^{- 1} x \right)}{\sqrt{1 - x^2}}\]
\[So, \frac{d}{dx}\left[ \sin\left( 2 \sin^{- 1} x \right) \right] = \frac{2\cos\left( 2 \sin^{- 1} x \right)}{\sqrt{1 - x^2}}\]
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