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Lim X → 0 Tan M X Tan N X

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Question

\[\lim_{x \to 0} \frac{\tan mx}{\tan nx}\] 

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Solution

\[\lim_{x \to 0} \left[ \frac{\tan mx}{\tan nx} \right]\] 

\[\Rightarrow \lim_{x \to 0} \left( \frac{\tan mx}{mx} \times \frac{mx}{nx} \times \frac{nx}{\tan nx} \right)\]
\[ \Rightarrow \lim_{x \to 0} \left( \frac{\tan mx}{mx} \times \frac{mx}{\frac{\tan nx}{nx}} \times nx \right)\]
\[ \Rightarrow \frac{m}{n} \left[ \because \lim_{x \to 0} \frac{\tan x}{x} = 1 \right]\]

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Chapter 29: Limits - Exercise 29.7 [Page 50]

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R.D. Sharma Mathematics [English] Class 11
Chapter 29 Limits
Exercise 29.7 | Q 7 | Page 50

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