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Evaluate the following limit. limx→0(cosecx- cotx) - Mathematics

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Question

Evaluate the following limit.

`lim_(x -> 0) (cosec x -  cot x)`

Sum
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Solution

`lim_(x → 0) (cosec x - cot x)`

= `lim_(x → 0) (1/sinx - cosx/sinx)`

= `lim_(x → 0) (1 - cosx)/sinx xx sinx/sinx`

= `lim_(x → 0) ((1 - cosx). sinx)/((1 - cosx)(1 + cosx))`

= `lim_(x → 0) ((sinx)/(1+ cosx))`

= `0/2`

= 0 

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Chapter 13: Limits and Derivatives - Exercise 13.1 [Page 302]

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NCERT Mathematics [English] Class 11
Chapter 13 Limits and Derivatives
Exercise 13.1 | Q 21 | Page 302

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