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Lim X → 0 a X + X Cos X B Sin X

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Question

\[\lim_{x \to 0} \frac{ax + x \cos x}{b \sin x}\]

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Solution

\[\lim_{x \to 0} \left[ \frac{ax + x \cos x}{b \sin x} \right]\]
\[\text{ Dividing the numerator and the denominator by } x:\]
\[ \lim_{x \to 0} \left[ \frac{a + \cos x}{b\left( \frac{\sin x}{x} \right)} \right] \left[ \because \lim_{x \to 0} \frac{\sin x}{x} = 1 \right]\]
\[ = \frac{a + \cos 0}{b}\]
\[ = \frac{a + 1}{b}\]

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Chapter 29: Limits - Exercise 29.7 [Page 51]

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R.D. Sharma Mathematics [English] Class 11
Chapter 29 Limits
Exercise 29.7 | Q 49 | Page 51

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