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Evaluate the following limit. limx→0ax+ xcosxbsinx

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Question

Evaluate the following limit.

`lim_(x -> 0) (ax +  xcos x)/(b sin x)`

Sum
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Solution

`lim_(x → 0)(ax + xcosx)/(bsinx)`

= `lim_(x → 0) (x (a + cosx))/((sin x). b)`

= `lim_(x → 0)(x/(sinx)). (a + cosx)/b`

= `lim_(x → 0) (a + cosx)/b`        .......`[∵  lim_(x → 0) x/(sinx) = 1]`

= `(a + cos 0)/b`

= `(a + 1)/b`

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Chapter 12: Limits and Derivatives - EXERCISE 12.1 [Page 238]

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NCERT Mathematics [English] Class 11
Chapter 12 Limits and Derivatives
EXERCISE 12.1 | Q 18. | Page 238

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